chore: update in-mem to v.0.2.1

package.json

@@ -26,7 +26,7 @@
     "@angular/platform-browser-dynamic": "~2.3.0",
     "@angular/router": "~3.3.0",
 
-    "angular-in-memory-web-api": "~0.2.0",
+    "angular-in-memory-web-api": "~0.2.1",
     "systemjs": "0.19.40",
     "core-js": "^2.4.1",
     "reflect-metadata": "^0.1.8",