diff --git a/package-lock.json b/package-lock.json
index 107f56a..84d8ef3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,7 +27,7 @@
       "dependencies": {
         "acorn": {
           "version": "2.7.0",
-          "resolved": "http://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
           "integrity": "sha1-q259nYhqrKiwhbwzEreaGYQz8Oc=",
           "dev": true
         }
@@ -1224,7 +1224,7 @@
       "dependencies": {
         "combined-stream": {
           "version": "1.0.6",
-          "resolved": "http://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
+          "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
           "integrity": "sha1-cj599ugBrFYTETp+RFqbactjKBg=",
           "dev": true,
           "requires": {
@@ -1277,7 +1277,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1298,12 +1299,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -1318,17 +1321,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1445,7 +1451,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1457,6 +1464,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -1471,6 +1479,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -1478,12 +1487,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -1502,6 +1513,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -1582,7 +1594,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -1594,6 +1607,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -1679,7 +1693,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -1715,6 +1730,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -1734,6 +1750,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -1777,12 +1794,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -2210,7 +2229,7 @@
       "dependencies": {
         "commander": {
           "version": "0.6.1",
-          "resolved": "http://registry.npmjs.org/commander/-/commander-0.6.1.tgz",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-0.6.1.tgz",
           "integrity": "sha1-+mihT2qUXVTbvlDYzbMyDp47GgY=",
           "dev": true
         },
@@ -2260,7 +2279,7 @@
       "dependencies": {
         "acorn": {
           "version": "2.7.0",
-          "resolved": "http://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
           "integrity": "sha1-q259nYhqrKiwhbwzEreaGYQz8Oc=",
           "dev": true
         }
@@ -2524,13 +2543,13 @@
       "dependencies": {
         "commander": {
           "version": "2.3.0",
-          "resolved": "http://registry.npmjs.org/commander/-/commander-2.3.0.tgz",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.3.0.tgz",
           "integrity": "sha1-/UMOiJgy7DU7ms0d4hfBHLPu+HM=",
           "dev": true
         },
         "debug": {
           "version": "2.0.0",
-          "resolved": "http://registry.npmjs.org/debug/-/debug-2.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.0.0.tgz",
           "integrity": "sha1-ib2d9nMrUSVrxnBTQrugLtEhMe8=",
           "dev": true,
           "requires": {
@@ -2587,7 +2606,7 @@
         },
         "ms": {
           "version": "0.6.2",
-          "resolved": "http://registry.npmjs.org/ms/-/ms-0.6.2.tgz",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-0.6.2.tgz",
           "integrity": "sha1-2JwhJMb9wTU9Zai3e/GqxLGTcIw=",
           "dev": true
         },
@@ -3287,7 +3306,7 @@
     },
     "recast": {
       "version": "0.10.24",
-      "resolved": "http://registry.npmjs.org/recast/-/recast-0.10.24.tgz",
+      "resolved": "https://registry.npmjs.org/recast/-/recast-0.10.24.tgz",
       "integrity": "sha1-7DR4EjIqyJWuGxLjBrZ/CE8CJ3o=",
       "dev": true,
       "requires": {
@@ -4142,9 +4161,9 @@
       "dev": true
     },
     "y18n": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz",
-      "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.2.tgz",
+      "integrity": "sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ==",
       "dev": true
     },
     "yargs": {