fix: Upgrade dependencies

package.json

@@ -30,14 +30,15 @@
     "object-assign": "^4.1.1"
   },
   "devDependencies": {
+    "@babel/core": "^7.1.6",
     "babel-cli": "^6.24.1",
-    "babel-core": "^6.25.0",
+    "babel-core": "^6.26.3",
     "babel-loader": "^8.0.3",
     "babel-plugin-istanbul": "^4.1.4",
-    "babel-preset-env": "^1.6.1",
+    "babel-preset-env": "^1.7.0",
     "babel-register": "^6.24.1",
     "chai": "^4.1.1",
-    "codecov": "^3.0.0",
+    "codecov": "^3.1.0",
     "cross-env": "^5.0.5",
     "css-loader": "^1.0.1",
     "doctoc": "^1.3.0",
@@ -46,14 +47,14 @@
     "express-urlrewrite": "^1.2.0",
     "file-loader": "^2.0.0",
     "json-loader": "^0.5.7",
-    "karma": "^3.0.0",
+    "karma": "^3.1.1",
     "karma-chai": "^0.1.0",
-    "karma-coverage": "^1.1.1",
+    "karma-coverage": "^1.1.2",
     "karma-mocha": "^1.3.0",
     "karma-mocha-reporter": "^2.2.3",
     "karma-phantomjs-launcher": "^1.0.4",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^2.0.4",
+    "karma-webpack": "^3.0.5",
     "mocha": "^5.0.0",
     "phantomjs-prebuilt": "^2.1.15",
     "rimraf": "^2.6.1",
@@ -73,7 +74,7 @@
     "vue-template-compiler": "^2.4.2",
     "vuex": "^3.0.0",
     "webpack": "^3.5.4",
-    "webpack-dev-server": "^3.1.5"
+    "webpack-dev-server": "^3.1.10"
   },
   "files": [
     "lib",