chore(schematics) remove dependency of @schematics/angular

Author: sulco

package.json

@@ -32,14 +32,13 @@
   },
   "homepage": "https://github.com/angular/angularfire2#readme",
   "dependencies": {
-    "@angular-devkit/core": "^0.7.3",
-    "@angular-devkit/schematics": "^0.7.3",
+    "@angular-devkit/core": "0.7.3",
+    "@angular-devkit/schematics": "0.7.3",
     "@angular/common": "^6.0.0",
     "@angular/compiler": "^6.0.0",
     "@angular/core": "^6.0.0",
     "@angular/platform-browser": "^6.0.0",
     "@angular/platform-browser-dynamic": "^6.0.0",
-    "@schematics/angular": "^0.7.3",
     "bufferutil": "^3.0.3",
     "firebase": "^5.0.3",
     "rxjs": "^6.0.0",

schematics/src/ng-add/index.ts

@@ -4,12 +4,12 @@ import { addPackageToPackageJson } from '../utils/package';
 import { NodePackageInstallTask } from '@angular-devkit/schematics/tasks';
 import { angularfire2Version, firebaseVersion } from '../utils/libs-version';
 import { addEnvironmentEntry } from '../utils/environment';
-import { parseName } from '@schematics/angular/utility/parse-name';
 import { getProjectPath } from '../utils/project';
 import { Schema } from './schema';
-import { addImportToModule, insertImport } from '@schematics/angular/utility/ast-utils';
-import { InsertChange } from '@schematics/angular/utility/change';
-import { buildRelativePath, findModuleFromOptions } from '@schematics/angular/utility/find-module';
+import { parseName } from '../schematics-core/utility/parse-name';
+import { buildRelativePath, findModuleFromOptions } from '../schematics-core/utility/find-module';
+import { addImportToModule, insertImport } from '../schematics-core/utility/ast-utils';
+import { InsertChange } from '../schematics-core/utility/change';
 
 export default function add(options: Schema): Rule {
   return chain([