Update dependency webpack-dev-server to v3.1.11 [SECURITY]

Author: renovate[bot]

2-resources/_External-learning-resources/01-Typescript/LearningTypeScript/chapters/chapter_09/package.json

@@ -31,7 +31,7 @@
     "tslint": "5.9.1",
     "typescript": "2.8.1",
     "webpack": "3.10.0",
-    "webpack-dev-server": "2.11.0"
+    "webpack-dev-server": "3.1.11"
   },
   "dependencies": {
     "chalk": "2.3.0"

2-resources/_External-learning-resources/01-Typescript/LearningTypeScript/chapters/chapter_11/package.json

@@ -47,6 +47,6 @@
     "tslint": "5.9.1",
     "typescript": "2.8.1",
     "webpack": "3.10.0",
-    "webpack-dev-server": "2.11.0"
+    "webpack-dev-server": "3.1.11"
   }
 }

2-resources/_External-learning-resources/01-Typescript/LearningTypeScript/chapters/chapter_12/package.json

@@ -48,6 +48,6 @@
     "tslint": "5.9.1",
     "typescript": "2.8.1",
     "webpack": "3.10.0",
-    "webpack-dev-server": "2.11.0"
+    "webpack-dev-server": "3.1.11"
   }
 }