fix(demo): updated firebase tools

Author: AnthonyNahas

demo/package-lock.json

@@ -75,7 +75,7 @@
     "@types/node": "^10.14.12",
     "codelyzer": "^5.1.0",
     "express": "^4.17.1",
-    "firebase-tools": "^6.12.0",
+    "firebase-tools": "^7.0.2",
     "http-server": "^0.11.1",
     "jasmine-core": "~3.3.0",
     "jasmine-spec-reporter": "~4.2.1",