update Karma package deps, fix for yarn install

.babelrc

@@ -2,4 +2,4 @@
   "presets": ["@babel/preset-env"],
   "plugins": ["@babel/plugin-transform-runtime"],
   "comments": false
-}
+}

package.json

@@ -26,6 +26,9 @@
   "peerDependencies": {
     "vue": "2.x"
   },
+  "resolutions": {
+    "ajv": "6.8.1"
+  },
   "devDependencies": {
     "@babel/core": "^7.0.0",
     "@babel/plugin-transform-runtime": "^7.0.0",
@@ -54,14 +57,14 @@
     "isparta": "^4.1.1",
     "jasmine": "^3.3.1",
     "json-loader": "^0.5.0",
-    "karma": "^0.13.22",
-    "karma-coverage": "^1.0.0",
+    "karma": "^4.0.0",
+    "karma-coverage": "^1.1.2",
     "karma-jasmine": "^2.0.1",
     "karma-mocha": "^1.3.0",
     "karma-phantomjs-launcher": "^1.0.4",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-spec-reporter": "0.0.32",
-    "karma-webpack": "^1.8.1",
+    "karma-spec-reporter": "^0.0.32",
+    "karma-webpack": "^3.0.5",
     "lolex": "^1.4.0",
     "markdown-code-highlight-loader": "^1.0.0",
     "mini-css-extract-plugin": "^0.5.0",
@@ -86,6 +89,5 @@
     "webpack-cli": "^3.2.1",
     "webpack-dev-server": "^3.1.10",
     "webpack-merge": "^0.13.0"
-  },
-  "dependencies": {}
+  }
 }