webpack parameter names expanded

RetrospectiveExtension.Frontend/package.json

@@ -4,8 +4,8 @@
   "description": "Reflect is an VSTS retrospective extension",
   "main": "index.tsx",
   "scripts": {
-    "build:d": "webpack -d",
-    "build:p": "set NODE_ENV=production && webpack -p",
+    "build:d": "webpack --development",
+    "build:p": "set NODE_ENV=production && webpack --mode=production",
     "lint": "eslint . --ext .ts,.tsx",
     "pack:d": "tfx extension create --manifests vss-extension-dev.json --output-path ./dist/",
     "pack:p": "tfx extension create --manifests vss-extension-prod.json --output-path ./dist/"