Fix Bot.*_chat_invite_link not returning ChatInviteLink (#548)

[darksidecat]

Bot.create_chat_invite_link()
Bot.edit_chat_invite_link()
Bot.revoke_chat_invite_link()

need to return types.ChatInviteLink, not dict

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context.

Fixes #548

Type of change

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Maybe this fix be breaking if users use dicts that was returned by these methods

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Methods return types.ChatInviteLink objects

Test Configuration:

• Operating System: Win10
• Python version: 3.9.2

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[evgfilim1]

Looks good, thanks for PR!