Add updateAnnotatedFile property

[aoisupersix]

Fixes #131

This PR adds updateAnnotatedFile property to @OpenApi() annotation.

When the timestamp is forcibly added or updated to the @OpenApi() annotated class, frequent differences occur in source control. Therefore, by adding the updateAnnotatedFile property, if false is set, the addition or update of the timestamp will not be performed.

@Openapi(
  ...
  updateAnnotatedFile: false,
)

Default is true to keep current behavior.

The operation was checked by uncommenting in openapi-generator/pubspec.yaml.

# dependency_overrides:
#  openapi_generator_annotations:
#    path: ../openapi-generator-annotations

[Rick-VA]

We tested it on 5 APIs, and it worked perfectly. Thanks

[DmitrySboychakov]

Also interested in this. When this can be merged?

[tjarvstrand]

Great change! Please merge :)

[aoisupersix]

This PR is blocked because it requires a review from a user with write permissions.
Also the package update process will likely be necessary after merge.
Therefore need to wait for owner (@gibahjoe) to respond.

[tjarvstrand]

@aoisupersix Yes, sorry, my comment was meant for @gibahjoe :)