This change removes the usage of the shell execution when spawning the latest CLI version when bootstrapping the update command. The absolute path of the node process is now spawned which removes the need for any shell path resolution. This also removes the need to quote and/or escape command arguments which can be error-prone. Node.js and the OS will now handle any quoting and escaping automatically and without any custom logic.
Prior to performing the initial updated package installation during the `ng update` process, the workspace node modules directory will be removed. This cleaning increases the guarantees that the package manager will hoist packages into the correct locations and avoid peer dependency inconsistencies.
With this change we change the package installation to async. This is needed as otherwise during `ng-add` the spinner gets stuck. With this change we also add the spinner in the installation methods.
With this change we automate the generation of `@angular/cli/lib/config/schema.json`. While on paper we could use quicktype for this. Quicktype doesn't handle `patternProperties` and `oneOf` that well.
How does this works?
Relative `$ref` will be resolved and inlined as part of the root schema definitions.
Example
```json
"@schematics/angular:enum": {
"$ref": "../../../../schematics/angular/enum/schema.json"
},
```
Will be parsed and transformed to
```json
"@schematics/angular:enum": {
"$ref": "#/definitions/SchematicsAngularEnumSchema"
},
"definitions: {
"SchematicsAngularEnumSchema": {
"title": "Angular Enum Options Schema",
"type": "object",
"description": "Generates a new, generic enum definition for the given or default project.",
"properties": {...}
}
}
```
