fix(): lock dependencies version

Author: lightningtgc

Diff for: frontend/package.json

@@ -136,8 +136,8 @@
     "@angular/router": "~3.2.0",
     "core-js": "^2.4.1",
     "intl": "^1.2.5",
-    "moment": "^2.17.1",
-    "ng2-bootstrap": "^1.1.16",
+    "moment": "2.17.1",
+    "ng2-bootstrap": "1.1.16",
     "reflect-metadata": "^0.1.8",
     "rxjs": "5.0.0-beta.12",
     "systemjs": "0.19.40",