Update package.json

Author: kumaresan-subramani

package.json

@@ -77,7 +77,8 @@
         "gulp-sass": "^3.1.0",
         "gulp-typescript": "^3.1.6",
         "run-sequence": "^2.2.0",
-        "shelljs": "^0.7.8",
+        "shelljs": "*",
+        "node-sass": "4.12.0",
         "requirejs": "^2.3.3",
         "typescript": "2.3.4"
     },