feat(schematics): change standalone default to true for components (#…

…4569)

BREAKING CHANGES:

The default setting for generating components using schematics is updated.

BEFORE:

The default setting for generating components using schematics does not use standalone components.

AFTER:

The default setting for generating components using schematics uses standalone components.

modules/schematics/src/container/schema.json

@@ -102,7 +102,8 @@
     },
     "standalone": {
       "description": "Whether the generated component is standalone.",
-      "type": "boolean"
+      "type": "boolean",
+      "default": true
     },
     "displayBlock": {
       "description": "Specifies if the style will contain :host { display: block; }.",