Pin dependencies

package.json

@@ -28,23 +28,23 @@
   },
   "homepage": "https://github.com/carlobeltrame/hal-json-normalizer#readme",
   "devDependencies": {
-    "@babel/core": "^7.7.5",
-    "@babel/preset-env": "^7.7.6",
-    "@babel/register": "^7.7.4",
-    "babel-eslint": "^10.0.3",
-    "babel-loader": "^8.0.6",
-    "chai": "^4.2.0",
-    "cross-env": "^6.0.3",
-    "eslint": "^6.7.2",
-    "eslint-config-airbnb-base": "^14.0.0",
-    "eslint-loader": "^3.0.3",
-    "eslint-plugin-import": "^2.19.1",
-    "mocha": "^6.2.2",
-    "nyc": "^15.0.0",
-    "rimraf": "^3.0.0",
-    "webpack": "^4.41.2",
-    "webpack-cli": "^3.3.10",
-    "webpack-node-externals": "^1.7.2"
+    "@babel/core": "7.7.5",
+    "@babel/preset-env": "7.7.6",
+    "@babel/register": "7.7.4",
+    "babel-eslint": "10.0.3",
+    "babel-loader": "8.0.6",
+    "chai": "4.2.0",
+    "cross-env": "6.0.3",
+    "eslint": "6.7.2",
+    "eslint-config-airbnb-base": "14.0.0",
+    "eslint-loader": "3.0.3",
+    "eslint-plugin-import": "2.19.1",
+    "mocha": "6.2.2",
+    "nyc": "15.0.0",
+    "rimraf": "3.0.0",
+    "webpack": "4.41.2",
+    "webpack-cli": "3.3.10",
+    "webpack-node-externals": "1.7.2"
   },
   "dependencies": {
     "lodash": "^4.17.15"