Replace ExcludedMethods by IgnoredMethods
Replace ExcludedMethods by IgnoredMethods

`ExcludedMethods` becomes obsolete in later version
of rubocop, showing warnings.

See https://github.com/rubocop/rubocop/pull/9098
and https://github.com/rubocop/rubocop/blob/1e55b1aa5e4c5eaeccad5d61f08b7930ed6bc341/relnotes/v1.5.0.md

bitcrowd/rubocop-bitcrowd