Restrict checking to exported interface methods

This release publishes work by @MichaelUrman which restricts checking to only exported interface methods as per the philosophy of the tool – ignoring unexported methods which must be by definition defined in the same package.

What's Changed

• Suppress reports from unexported interface methods by @MichaelUrman in #52

New Contributors

• @MichaelUrman made their first contribution in #52

Full Changelog: v2.8.3...v2.9.0