Allow larger ids for CheckSuite.id deserialization

[swarkentin]

What did you implement:

Changed CheckSuite property, id from u32 to u64 in order to properly deserialize Github API responses which have ids that are now larger than u32.

⚠️ This is a breaking change for any consumers of this class.

How did you verify your change:

• Derserialized responses from active GitHub CheckSuites

What (if anything) would need to be called out in the CHANGELOG for the next release:

• CheckSuite.id changed from u32->u64