Upgraded firebase tools

package.json

@@ -31,7 +31,7 @@
     "electron": "^2.0.4",
     "electron-packager": "^12.1.0",
     "firebase": "^5.1.0",
-    "firebase-tools": "^3.19.0",
+    "firebase-tools": "^6.0.1",
     "hammerjs": "^2.0.8",
     "ng-simple-slideshow": "^1.2.3",
     "ngx-electron": "^1.0.4",
@@ -60,4 +60,4 @@
     "tslint": "~5.9.1",
     "typescript": "~3.1.6"
   }
-}
+}