fix: downgrade Nx-deps (compatibility with Angular 12) (#58)

* fix: downgrade `Nx`-deps (compatibility with Angular 12)

* chore: install `@nrwl/nx-cloud@13` and set it as nx task runner

Author: nsbarsukov

angular.json

@@ -1,7 +1,6 @@
 {
     "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
     "version": 1,
-    "newProjectRoot": "projects",
     "projects": {
         "demo": {
             "projectType": "application",

nx.json

@@ -14,7 +14,7 @@
     "npmScope": "angular-open-source-starter",
     "tasksRunnerOptions": {
         "default": {
-            "runner": "@nx-cloud/runners/firebase",
+            "runner": "@nrwl/nx-cloud",
             "options": {
                 "cacheableOperations": ["build", "test", "lint"],
                 "parallel": 1