[BUG][typescript-angular] Generating client library with ngVersion=10.2

[DmytroMysak]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Generator typescript-angular delivers incompatible versions for Angular 10.x in package.json. This causes npm run build to fail.

New dependencies in Angular Compiler requires TypeScript >=4.0.0 and <4.1.0.

openapi-generator version

v4.3.1 / The last stable version of OpenAPITools/openapi-generator using openapi-generator-cli

OpenAPI declaration file content or url

Example: https://github.com/OAI/OpenAPI-Specification/edit/master/examples/v3.0/petstore.yaml

Command line used for generation

openapi-generator-cli generate -i petstore.yaml -g typescript-angular -o petstore --additional-properties="npmName=petstore,npmVersion=0.9.0,withInterfaces=true,providedInRoot=true,ngVersion=10.2.0"

Generation Details

Steps to reproduce

• Run the command to generate the output (see above)
• Install the dependencies npm install, which creates these warnings:

• Run npm run build and error in result:
  ERROR: The Angular Compiler requires TypeScript >=3.9.2 and <4.1.0 but 3.7.5 was found instead.

Expected result:

Suggest a fix

Update typescript version in package.json from "typescript": ">=3.6.0 <3.8.0", to "typescript": ">=3.9.2 <=4.1.0"

[macjohnny]

this is already implemented and will be released in version 5.0.0. it is already part of version 5.0.0-beta3

https://github.com/OpenAPITools/openapi-generator/blob/master/samples/client/petstore/typescript-angular-v10-provided-in-root/builds/with-npm/package.json#L19-L28