Support deprecation of input fields on input types

[swkrn]

Hi,

The GraphQL spec now allows the deprecation of input fields on input types, as shown below:

input I {
    a: String
    d: String @deprecated(reason: "Please don't")
}

Ref: graphql/graphql-spec@94f73f4

It would be great if this library supported @Deprecatedannotations for input fields.

Generated code:

class Input$I {
  factory Input$I({String? a, @Deprecated('Please don\'t') String? d}) => ...
}

[github-actions]

👋 @swkrn
Thank you for raising an issue. I will investigate the issue and get back to you as soon as possible.
Please make sure you have provided enough context.

This library is created and maintained by me, @budde377. Please consider supporting my work and ensure our survival by donating here.

[budde377]

This should be released as v3.0.1