Upgrade major deps

Author: kpdecker

package.json

@@ -60,11 +60,11 @@
     "grunt-cli": "^1.3.2",
     "grunt-contrib-clean": "^2.0.0",
     "grunt-contrib-copy": "^1.0.0",
-    "grunt-contrib-uglify": "^4.0.0",
+    "grunt-contrib-uglify": "^5.0.0",
     "grunt-contrib-watch": "^1.1.0",
-    "grunt-eslint": "^21.0.0",
+    "grunt-eslint": "^23.0.0",
     "grunt-exec": "^3.0.0",
-    "grunt-karma": "^3.0.1",
+    "grunt-karma": "^4.0.0",
     "grunt-mocha-istanbul": "^5.0.2",
     "grunt-mocha-test": "^0.13.3",
     "grunt-webpack": "^3.1.3",
@@ -76,10 +76,10 @@
     "karma-sauce-launcher": "^4.1.5",
     "karma-sourcemap-loader": "^0.3.6",
     "karma-webpack": "^4.0.2",
-    "mocha": "^5.2.0",
+    "mocha": "^6.0.0",
     "rollup": "^1.0.2",
     "rollup-plugin-babel": "^4.2.0",
-    "semver": "^5.6.0",
+    "semver": "^7.3.2",
     "webpack": "^4.28.3",
     "webpack-dev-server": "^3.1.14"
   },