Merge branch 'master' into greenkeeper/grunt-contrib-uglify-4.0.0

Author: joelmukuthu

package.json

@@ -20,7 +20,7 @@
   "license": "MIT",
   "devDependencies": {
     "babel-plugin-add-module-exports": "^0.2.1",
-    "babel-plugin-istanbul": "^4.1.3",
+    "babel-plugin-istanbul": "^5.1.1",
     "babel-plugin-transform-es2015-modules-umd": "^6.18.0",
     "babel-preset-es2015": "^6.18.0",
     "coveralls": "^3.0.1",
@@ -29,14 +29,14 @@
     "grunt": "^1.0.1",
     "grunt-babel": "^6.0.0",
     "grunt-banner": "^0.6.0",
-    "grunt-contrib-clean": "^1.0.0",
+    "grunt-contrib-clean": "^2.0.0",
     "grunt-contrib-uglify": "^4.0.0",
     "grunt-release-it": "^1.0.1",
-    "jsdom": "^11.6.2",
+    "jsdom": "^13.0.0",
     "jsdom-global": "^3.0.2",
     "load-grunt-tasks": "^4.0.0",
     "mocha": "^5.0.0",
-    "nyc": "^11.4.1",
+    "nyc": "^13.2.0",
     "unexpected": "^10.13.3"
   },
   "babel": {