Merge pull request #5232 from spalger/jsonLoaderIsProdDep

[npm] json-loader is a production dependency

package.json

@@ -103,6 +103,7 @@
     "joi": "6.6.1",
     "jquery": "2.1.4",
     "js-yaml": "3.4.1",
+    "json-loader": "0.5.3",
     "json-stringify-safe": "5.0.1",
     "jstimezonedetect": "1.0.5",
     "leaflet": "0.7.5",
@@ -154,7 +155,6 @@
     "husky": "0.8.1",
     "intern": "3.0.1",
     "istanbul-instrumenter-loader": "0.1.3",
-    "json-loader": "0.5.3",
     "karma": "0.13.9",
     "karma-chrome-launcher": "0.2.0",
     "karma-coverage": "0.5.1",