Upgrade webpack & plugins

Signed-off-by: David Mehren <dmehren1@gmail.com>

package.json

@@ -174,8 +174,8 @@
     "babel-polyfill": "^6.26.0",
     "babel-preset-env": "^1.7.0",
     "babel-runtime": "^6.26.0",
-    "copy-webpack-plugin": "^4.5.2",
-    "css-loader": "^1.0.0",
+    "copy-webpack-plugin": "^5.0.5",
+    "css-loader": "^3.2.0",
     "eslint": "^5.9.0",
     "eslint-config-standard": "^12.0.0",
     "eslint-plugin-import": "^2.14.0",
@@ -183,23 +183,23 @@
     "eslint-plugin-promise": "^4.0.1",
     "eslint-plugin-standard": "^4.0.0",
     "expose-loader": "^0.7.5",
-    "file-loader": "^2.0.0",
-    "html-webpack-plugin": "4.0.0-beta.2",
+    "file-loader": "^4.3.0",
+    "html-webpack-plugin": "^4.0.0-beta.11",
     "imports-loader": "^0.8.0",
     "jsonlint": "^1.6.2",
-    "less": "^2.7.1",
-    "less-loader": "^4.1.0",
-    "mini-css-extract-plugin": "^0.4.1",
+    "less": "^3.10.3",
+    "less-loader": "^5.0.0",
+    "mini-css-extract-plugin": "^0.8.0",
     "mocha": "^5.2.0",
     "mock-require": "^3.0.3",
-    "optimize-css-assets-webpack-plugin": "^5.0.0",
+    "optimize-css-assets-webpack-plugin": "^5.0.3",
     "script-loader": "^0.7.2",
     "string-loader": "^0.0.1",
-    "style-loader": "^0.21.0",
-    "url-loader": "^1.0.1",
-    "webpack": "^4.14.0",
-    "webpack-cli": "^3.1.0",
-    "webpack-merge": "^4.1.4"
+    "style-loader": "^1.0.0",
+    "url-loader": "^2.3.0",
+    "webpack": "^4.41.2",
+    "webpack-cli": "^3.3.10",
+    "webpack-merge": "^4.2.2"
   },
   "optionalDependencies": {
     "bufferutil": "^4.0.0",