bump karma forward (#287)

package.json

@@ -47,7 +47,7 @@
     "cross-env": "5.2.0",
     "esm": "3.2.18",
     "execa": "1.0.0",
-    "karma": "^3.0.0",
+    "karma": "^4.0.1",
     "karma-chrome-launcher": "^2.2.0",
     "karma-cli": "^1.0.1",
     "karma-firefox-launcher": "^1.1.0",
@@ -55,7 +55,7 @@
     "karma-mocha-reporter": "^2.2.5",
     "karma-requirejs": "^1.1.0",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^3.0.0",
+    "karma-webpack": "^3.0.5",
     "mocha": "^5.2.0",
     "mocha-junit-reporter": "^1.15.0",
     "mocha-multi-reporters": "^1.1.6",