This change provides more fine-grained warnings during the `update-module-and-target-compiler-options` migration for V10.0 in the event a TypeScript configuration file could not be updated. The `JSONFile` utility class was also augmented to directly throw when created to ensure that the `content` property is always initialized.
The schematics recently siwtcher to `jsonc-parser` as the JSOn parser, and that introduced a small regression in the tslint.json file where the rules order is not the same as previously.
See https://github.com/cexbrayat/angular-cli-diff/compare/10.0.2...10.1.0-next.0
This commit should fix the issue by providing the insertion index when merging the tslint files.
A test has also been added to avoid further regressions.
Currently, interaction with JSON AST is complex and requires a lot of boiler-platting. With this change we add `jsonc-parser` and add a basic helper class to greatly simplify such interaction.
This would come in handle when writing new migrations in 10.1+
**Note**: this is a private implementation and shouldn't be used by 3rd parties.
