Bump golangci-lint from v1.25.1 to v1.28.1
This MR bumps the version of golangci-lint. Mostly importantly the newer version includes https://github.com/golangci/golangci-lint/commit/c88df8f47380711e63a012aa8f5b9536d27169bb without which, code climate reports will panic. A full set of changes since v1.15.1
can be found here: https://github.com/golangci/golangci-lint/releases