Update packages & rebuild

web_interface/package.json

@@ -2,16 +2,16 @@
   "name": "SmartUPS",
   "version": "0.1.0",
   "devDependencies": {
-    "eslint": "^4.11.0",
+    "eslint": "^6.4.0",
     "grunt": "^1.0.1",
-    "grunt-contrib-clean": "^1.1.0",
+    "grunt-contrib-clean": "^2.0.0",
     "grunt-contrib-compress": "^1.4.3",
-    "grunt-contrib-cssmin": "^2.2.1",
-    "grunt-contrib-htmlmin": "^2.4.0",
-    "grunt-contrib-imagemin": "^2.0.1",
-    "grunt-contrib-jshint": "^1.1.0",
-    "grunt-contrib-nodeunit": "~1.0.0",
-    "grunt-contrib-uglify": "^3.1.0",
+    "grunt-contrib-cssmin": "^3.0.0",
+    "grunt-contrib-htmlmin": "^3.1.0",
+    "grunt-contrib-imagemin": "^3.1.0",
+    "grunt-contrib-jshint": "^2.1.0",
+    "grunt-contrib-nodeunit": "~2.0.0",
+    "grunt-contrib-uglify": "^4.0.1",
     "grunt-processhtml": "^0.4.1",
     "grunt-replace": "^1.0.1"
   },