Updated dev dependencies

package.json

@@ -50,7 +50,7 @@
     "clean-css-cli": "4.2.1",
     "copy-webpack-plugin": "^4.4.1",
     "coveralls": "3.0.1",
-    "eslint": "5.0.1",
+    "eslint": "^5.8.0",
     "eslint-config-openlayers": "^11.0.0",
     "expect.js": "0.3.1",
     "front-matter": "^3.0.0",
@@ -61,14 +61,14 @@
     "jquery": "3.3.1",
     "jsdoc": "3.5.5",
     "jsdoc-plugin-typescript": "^1.0.2",
-    "karma": "^3.0.0",
+    "karma": "^3.1.1",
     "karma-chrome-launcher": "2.2.0",
-    "karma-coverage": "^1.1.1",
+    "karma-coverage": "^1.1.2",
     "karma-firefox-launcher": "^1.1.0",
     "karma-mocha": "1.3.0",
     "karma-sauce-launcher": "1.2.0",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "4.0.0-beta.0",
+    "karma-webpack": "^4.0.0-rc.2",
     "marked": "0.5.1",
     "mocha": "5.2.0",
     "mustache": "^3.0.0",