fix: group packages in schematics, add min requirements, furthe reading

Author: dherges

packages/schematics/README.md

@@ -25,4 +25,10 @@ npm publish
 ```
 
 That's it!
- 
+ 
+
+#### Futher Reading
+
+- https://brianflove.com/2018/12/11/angular-schematics-tutorial/
+- `ng update --registry http://myregistry.org`: https://github.com/angular/angular-cli/issues/10624
+- ng update command: https://github.com/angular/angular-cli/blob/master/docs/specifications/update.md#library-developers

packages/schematics/package.json

@@ -1,7 +1,8 @@
 {
-  "name": "schematics",
+  "name": "@sparkles/schematics",
   "version": "0.0.0",
   "description": "Sample schematics",
+  "license": "MIT",
   "scripts": {
     "build": "../../node_modules/.bin/tsc -p tsconfig.lib.json",
     "test": "npm run build && jasmine src/**/*_spec.js",
@@ -10,11 +11,17 @@
   "keywords": [
     "schematics"
   ],
-  "author": "",
-  "license": "MIT",
   "schematics": "./src/collection.json",
   "ng-update": {
-    "migrations": "./src/migration.json"
+    "migrations": "./src/migration.json",
+    "packageGroup": [
+      "@sparkles/components",
+      "@sparkles/styles",
+      "@sparkles/schematics"
+    ],
+    "requirements": {
+      "@sparkles/schematics": ">= 1"
+    }
   },
   "dependencies": {
     "@angular-devkit/core": "^7.3.8",

packages/schematics/src/ng-update/index.ts

@@ -1,4 +1,5 @@
 import { Rule, SchematicContext, Tree } from '@angular-devkit/schematics';
+import { updateJsonInTree } from '@nrwl/schematics/src/utils/ast-utils';
 
 export function updateToV1(): Rule {
   return (tree: Tree, _context: SchematicContext) => {