Update webpack to v3 and fix package warnings

package.json

@@ -67,7 +67,6 @@
     "react-debounce-input": "^3.2.0",
     "react-dom": "^15.6.2",
     "react-height": "^2.0.0",
-    "react-hot-loader": "1.3.1",
     "react-immutable-proptypes": "2.1.0",
     "react-immutable-pure-component": "^1.1.1",
     "react-markdown": "^2.5.0",
@@ -86,7 +85,6 @@
     "swagger-client": "^3.8.1",
     "url-parse": "^1.1.8",
     "whatwg-fetch": "0.11.1",
-    "worker-loader": "^0.7.1",
     "xml": "1.0.1",
     "xml-but-prettier": "^1.0.1",
     "yaml-js": "0.2.0",
@@ -107,21 +105,20 @@
     "babel-runtime": "^6.23.0",
     "chromedriver": "^2.38.3",
     "copy-webpack-plugin": "^4.0.1",
-    "css-loader": "0.28.4",
-    "deep-extend": "^0.5.0",
+    "css-loader": "^0.28.11",
     "deepmerge": "^2.1.0",
     "enzyme": "^2.7.1",
     "eslint": "^4.1.1",
     "eslint-plugin-import": "^2.6.0",
     "eslint-plugin-mocha": "^4.11.0",
     "eslint-plugin-react": "^7.1.0",
-    "extract-text-webpack-plugin": "^2.1.2",
-    "file-loader": "0.11.2",
+    "extract-text-webpack-plugin": "^3.0.2",
+    "file-loader": "^1.1.11",
     "git-describe": "^4.0.1",
-    "imports-loader": "0.7.1",
+    "imports-loader": "^0.8.0",
     "jsdom": "^11.10.0",
-    "json-loader": "0.5.4",
-    "json-server": "^0.11.0",
+    "json-loader": "^0.5.7",
+    "json-server": "^0.12.2",
     "less": "^3.0.2",
     "license-checker": "^19.0.0",
     "mocha": "^5.1.1",
@@ -133,19 +130,20 @@
     "open": "0.0.5",
     "postcss-loader": "^2.1.5",
     "raw-loader": "0.5.1",
-    "react-hot-loader": "^1.3.1",
     "react-test-renderer": "^15.5.4",
     "rimraf": "^2.6.0",
-    "sass-loader": "^6.0.2",
+    "sass-loader": "^7.0.1",
     "selenium-server-standalone-jar": "^3.11.0",
     "standard": "^11.0.1",
     "standard-loader": "^6.0.1",
-    "style-loader": "0.18.2",
+    "style-loader": "^0.21.0",
     "tachyons-sass": "^4.9.2",
     "uglifyjs-webpack-plugin": "^1.2.5",
-    "url-loader": "0.5.9",
-    "webpack": "^2.6.1",
-    "webpack-bundle-size-analyzer": "^2.5.0"
+    "url-loader": "^1.0.1",
+    "webpack": "^3.1.0",
+    "webpack-bundle-size-analyzer": "^2.5.0",
+    "webpack-cli": "^2.0.4",
+    "worker-loader": "^1.1.1"
   },
   "config": {
     "deps_check_dir": ".deps_check"
@@ -156,7 +154,7 @@
     "IE 11"
   ],
   "optionalDependencies": {
-    "webpack-dev-server": "2.5.0"
+    "webpack-dev-server": "^2.11.1"
   },
   "nyc": {
     "all": true,