diff --git a/example/package-lock.json b/example/package-lock.json
index 83b0725..8edfbc7 100644
--- a/example/package-lock.json
+++ b/example/package-lock.json
@@ -2054,7 +2054,8 @@
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.1.1",
@@ -2097,7 +2098,8 @@
         },
         "balanced-match": {
           "version": "0.4.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "bcrypt-pbkdf": {
           "version": "1.0.1",
@@ -2110,6 +2112,7 @@
         "block-stream": {
           "version": "0.0.9",
           "bundled": true,
+          "optional": true,
           "requires": {
             "inherits": "2.0.3"
           }
@@ -2117,6 +2120,7 @@
         "boom": {
           "version": "2.10.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "hoek": "2.16.3"
           }
@@ -2124,6 +2128,7 @@
         "brace-expansion": {
           "version": "1.1.7",
           "bundled": true,
+          "optional": true,
           "requires": {
             "balanced-match": "0.4.2",
             "concat-map": "0.0.1"
@@ -2131,7 +2136,8 @@
         },
         "buffer-shims": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "caseless": {
           "version": "0.12.0",
@@ -2145,30 +2151,36 @@
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "combined-stream": {
           "version": "1.0.5",
           "bundled": true,
+          "optional": true,
           "requires": {
             "delayed-stream": "1.0.0"
           }
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "cryptiles": {
           "version": "2.0.5",
           "bundled": true,
+          "optional": true,
           "requires": {
             "boom": "2.10.1"
           }
@@ -2203,7 +2215,8 @@
         },
         "delayed-stream": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "delegates": {
           "version": "1.0.0",
@@ -2230,7 +2243,8 @@
         },
         "extsprintf": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "forever-agent": {
           "version": "0.6.1",
@@ -2249,11 +2263,13 @@
         },
         "fs.realpath": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "fstream": {
           "version": "1.0.11",
           "bundled": true,
+          "optional": true,
           "requires": {
             "graceful-fs": "4.1.11",
             "inherits": "2.0.3",
@@ -2304,6 +2320,7 @@
         "glob": {
           "version": "7.1.2",
           "bundled": true,
+          "optional": true,
           "requires": {
             "fs.realpath": "1.0.0",
             "inflight": "1.0.6",
@@ -2315,7 +2332,8 @@
         },
         "graceful-fs": {
           "version": "4.1.11",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "har-schema": {
           "version": "1.0.5",
@@ -2339,6 +2357,7 @@
         "hawk": {
           "version": "3.1.3",
           "bundled": true,
+          "optional": true,
           "requires": {
             "boom": "2.10.1",
             "cryptiles": "2.0.5",
@@ -2348,7 +2367,8 @@
         },
         "hoek": {
           "version": "2.16.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "http-signature": {
           "version": "1.1.1",
@@ -2363,6 +2383,7 @@
         "inflight": {
           "version": "1.0.6",
           "bundled": true,
+          "optional": true,
           "requires": {
             "once": "1.4.0",
             "wrappy": "1.0.2"
@@ -2370,7 +2391,8 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.4",
@@ -2380,6 +2402,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "1.0.1"
           }
@@ -2391,7 +2414,8 @@
         },
         "isarray": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "isstream": {
           "version": "0.1.2",
@@ -2454,11 +2478,13 @@
         },
         "mime-db": {
           "version": "1.27.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "mime-types": {
           "version": "2.1.15",
           "bundled": true,
+          "optional": true,
           "requires": {
             "mime-db": "1.27.0"
           }
@@ -2466,21 +2492,11 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "1.1.7"
           }
         },
-        "minimist": {
-          "version": "0.0.8",
-          "bundled": true
-        },
-        "mkdirp": {
-          "version": "0.5.1",
-          "bundled": true,
-          "requires": {
-            "minimist": "0.0.8"
-          }
-        },
         "ms": {
           "version": "2.0.0",
           "bundled": true,
@@ -2526,7 +2542,8 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "oauth-sign": {
           "version": "0.8.2",
@@ -2541,6 +2558,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "wrappy": "1.0.2"
           }
@@ -2566,7 +2584,8 @@
         },
         "path-is-absolute": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "performance-now": {
           "version": "0.2.0",
@@ -2575,7 +2594,8 @@
         },
         "process-nextick-args": {
           "version": "1.0.7",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "punycode": {
           "version": "1.4.1",
@@ -2596,18 +2616,12 @@
             "ini": "1.3.4",
             "minimist": "1.2.0",
             "strip-json-comments": "2.0.1"
-          },
-          "dependencies": {
-            "minimist": {
-              "version": "1.2.0",
-              "bundled": true,
-              "optional": true
-            }
           }
         },
         "readable-stream": {
           "version": "2.2.9",
           "bundled": true,
+          "optional": true,
           "requires": {
             "buffer-shims": "1.0.0",
             "core-util-is": "1.0.2",
@@ -2650,13 +2664,15 @@
         "rimraf": {
           "version": "2.6.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "glob": "7.1.2"
           }
         },
         "safe-buffer": {
           "version": "5.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "semver": {
           "version": "5.3.0",
@@ -2676,6 +2692,7 @@
         "sntp": {
           "version": "1.0.9",
           "bundled": true,
+          "optional": true,
           "requires": {
             "hoek": "2.16.3"
           }
@@ -2703,22 +2720,24 @@
             }
           }
         },
-        "string_decoder": {
-          "version": "1.0.1",
-          "bundled": true,
-          "requires": {
-            "safe-buffer": "5.0.1"
-          }
-        },
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
+          "optional": true,
           "requires": {
             "code-point-at": "1.1.0",
             "is-fullwidth-code-point": "1.0.0",
             "strip-ansi": "3.0.1"
           }
         },
+        "string_decoder": {
+          "version": "1.0.1",
+          "bundled": true,
+          "optional": true,
+          "requires": {
+            "safe-buffer": "5.0.1"
+          }
+        },
         "stringstream": {
           "version": "0.0.5",
           "bundled": true,
@@ -2727,6 +2746,7 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "2.1.1"
           }
@@ -2739,6 +2759,7 @@
         "tar": {
           "version": "2.2.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "block-stream": "0.0.9",
             "fstream": "1.0.11",
@@ -2788,7 +2809,8 @@
         },
         "util-deprecate": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "uuid": {
           "version": "3.0.1",
@@ -2813,7 +2835,8 @@
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         }
       }
     },
@@ -3824,12 +3847,12 @@
     "minimist": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-      "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
+      "integrity": "sha512-7Wl+Jz+IGWuSdgsQEJ4JunV0si/iMhg42MnQQG6h1R6TNeVenp4U9x5CC5v/gYqz/fENLQITAWXidNtVL0NNbw=="
     },
     "mkdirp": {
       "version": "0.5.1",
       "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "integrity": "sha512-SknJC52obPfGQPnjIkXbmA6+5H15E+fR+E4iR2oQ3zzCLbd7/ONua69R/Gw7AgkTLsRG+r5fzksYwWe1AgTyWA==",
       "requires": {
         "minimist": "0.0.8"
       },
@@ -3837,7 +3860,7 @@
         "minimist": {
           "version": "0.0.8",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
+          "integrity": "sha512-miQKw5Hv4NS1Psg2517mV4e4dYNaO3++hjAvLOAzKqZ61rH8NS1SK+vbfBWZ5PY/Me/bEWhUwqMghEW5Fb9T7Q=="
         }
       }
     },
@@ -4037,21 +4060,21 @@
     "optimist": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.6.1.tgz",
-      "integrity": "sha1-2j6nRob6IaGaERwybpDrFaAZZoY=",
+      "integrity": "sha512-snN4O4TkigujZphWLN0E//nQmm7790RYaE53DdL7ZYwee2D8DDo9/EyYiKUfN3rneWUjhJnueija3G9I2i0h3g==",
       "requires": {
-        "minimist": "0.0.10",
-        "wordwrap": "0.0.3"
+        "minimist": "~0.0.1",
+        "wordwrap": "~0.0.2"
       },
       "dependencies": {
         "minimist": {
           "version": "0.0.10",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz",
-          "integrity": "sha1-3j+YVD2/lggr5IrRoMfNqDYwHc8="
+          "integrity": "sha512-iotkTvxc+TwOm5Ieim8VnSNvCDjCK9S8G3scJ50ZthspSxa7jx50jkhYduuAtAjvfDUwSgOwf8+If99AlOEhyw=="
         },
         "wordwrap": {
           "version": "0.0.3",
           "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-          "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc="
+          "integrity": "sha512-1tMA907+V4QmxV7dbRvb4/8MaRALK6q9Abid3ndMYnbyo8piisCmeONVqVSXqQA3KaP4SLt5b7ud6E2sqP8TFw=="
         }
       }
     },
@@ -5257,11 +5280,6 @@
         "readable-stream": "1.1.14"
       }
     },
-    "string_decoder": {
-      "version": "0.10.31",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
-      "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ="
-    },
     "string-width": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
@@ -5291,6 +5309,11 @@
         }
       }
     },
+    "string_decoder": {
+      "version": "0.10.31",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+      "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ="
+    },
     "stringstream": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz",