fix(deps): update grunt-contrib-cssmin to 1.0.2 (yeoman#1371)

Fixes: yeoman#1320

Author: aniknafs

templates/common/root/_package.json

@@ -38,7 +38,7 @@
     "grunt-contrib-concat": "^0.5.0",
     "grunt-contrib-connect": "^0.9.0",
     "grunt-contrib-copy": "^0.7.0",
-    "grunt-contrib-cssmin": "^0.12.0",
+    "grunt-contrib-cssmin": "^1.0.2",
     "grunt-contrib-htmlmin": "^0.4.0",
     "grunt-contrib-imagemin": "^1.0.0",
     "grunt-contrib-jshint": "^0.11.0",