DevEnv: update frontend dependencies - grunt (#22136)

* DevEnv: updates grunt 1.0.1 -> 1.0.4

* DevEnv: updates grunt-cli 1.2.0 -> 1.3.2

* DevEnv: updates grunt-contrib-clean 1.0.0 -> 2.0.0

* DevEnv: updates grunt-exec 1.0.1 -> 3.0.0

* DevEnv: updates grunt-postcss 0.8.0 -> 0.9.0

* DevEnv: updates load-grunt-tasks 3.5.2 -> 5.1.0

package.json

@@ -88,16 +88,16 @@
     "fork-ts-checker-webpack-plugin": "1.0.0",
     "gaze": "1.1.3",
     "glob": "7.1.3",
-    "grunt": "1.0.1",
+    "grunt": "1.0.4",
     "grunt-angular-templates": "1.1.0",
-    "grunt-cli": "1.2.0",
-    "grunt-contrib-clean": "1.0.0",
+    "grunt-cli": "1.3.2",
+    "grunt-contrib-clean": "2.0.0",
     "grunt-contrib-compress": "1.6.0",
     "grunt-contrib-copy": "1.0.0",
-    "grunt-exec": "1.0.1",
+    "grunt-exec": "3.0.0",
     "grunt-newer": "1.3.0",
     "grunt-notify": "0.4.5",
-    "grunt-postcss": "0.8.0",
+    "grunt-postcss": "0.9.0",
     "grunt-sass-lint": "0.2.4",
     "grunt-usemin": "3.1.1",
     "grunt-webpack": "3.1.3",
@@ -110,7 +110,7 @@
     "jest-date-mock": "1.0.7",
     "lerna": "^3.15.0",
     "lint-staged": "8.1.5",
-    "load-grunt-tasks": "3.5.2",
+    "load-grunt-tasks": "5.1.0",
     "mini-css-extract-plugin": "0.5.0",
     "mocha": "4.1.0",
     "module-alias": "2.2.0",