add field deprecatedReason in inputType options for deprecating input…

[Dev-cmyser]

… fields

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• [] Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• [x ] Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[Dev-cmyser]

hi i would like to add this feature in this library

pleade tag me for rewiew, thanks!

[kamilmysliwiec]

Could you add corresponding tests too?

[Dev-cmyser]

Could you add corresponding tests too?

yes i could
At least I'll try

[Dev-cmyser]

it's hard)

[Dev-cmyser]

I'll try in some future sgain