Upgrade dependencies

* Upgrade all dependencies for the plugin and example projects
* Fix the linting

.eslintignore

@@ -1,2 +1,2 @@
+build
 node_modules
-public

examples/react/package.json

@@ -12,20 +12,20 @@
     }
   ],
   "dependencies": {
-    "@babel/core": "^7.0.1",
-    "@babel/preset-env": "^7.0.0",
+    "@babel/core": "^7.1.2",
+    "@babel/preset-env": "^7.1.0",
     "@babel/preset-react": "^7.0.0",
-    "babel-loader": "^8.0.2",
-    "css-loader": "^1.0.0",
-    "express": "^4.16.3",
-    "mini-css-extract-plugin": "^0.4.0",
+    "babel-loader": "^8.0.4",
+    "css-loader": "^1.0.1",
+    "express": "^4.16.4",
+    "mini-css-extract-plugin": "^0.4.4",
     "prop-types": "^15.6.2",
-    "react": "^16.5.0",
-    "react-dom": "^16.5.0",
-    "react-hot-loader": "^4.3.7",
-    "webpack": "^4.18.1",
-    "webpack-cli": "^3.1.0",
-    "webpack-dev-server": "^3.1.8"
+    "react": "^16.6.0",
+    "react-dom": "^16.6.0",
+    "react-hot-loader": "^4.3.12",
+    "webpack": "^4.23.1",
+    "webpack-cli": "^3.1.2",
+    "webpack-dev-server": "^3.1.10"
   },
   "description": "A usage example for the external-svg-sprite-loader for Webpack and React.",
   "engines": {