Update dev dependencies to hopefully make coverage calculation more deterministic (knex#2810)

Author: kibertoad

package.json

@@ -41,7 +41,7 @@
     "chai": "^4.1.2",
     "chai-subset-in-order": "^2.1.2",
     "coveralls": "^3.0.2",
-    "eslint": "5.4.0",
+    "eslint": "5.6.0",
     "eslint-config-prettier": "^3.0.1",
     "eslint-plugin-import": "^2.14.0",
     "husky": "^0.14.3",
@@ -52,14 +52,14 @@
     "mssql": "^4.1.0",
     "mysql": "^2.16.0",
     "mysql2": "^1.6.1",
-    "nyc": "^12.0.2",
+    "nyc": "^13.0.1",
     "pg": "^7.4.3",
     "pg-query-stream": "^1.1.1",
     "prettier": "^1.14.2",
     "rimraf": "^2.6.2",
-    "sinon": "^6.1.5",
+    "sinon": "^6.3.3",
     "sinon-chai": "^3.2.0",
-    "source-map-support": "^0.5.8",
+    "source-map-support": "^0.5.9",
     "sqlite3": "^4.0.2",
     "tap-spec": "^5.0.0",
     "tape": "^4.9.1",