Exclude *.gemspec by default #54
Description
Is your feature request related to a problem? Please describe.
When using this gem inside a Gem project, all text lines in the Gemspec file will be marked as missing a decorator.
Describe the solution you'd like
ANY gemspec file to be ignored by default
Describe alternatives you've considered
Manually adding a line to RuboCop's config file for every cop, or explicitly adding gemspec files to Global exclude sections
Additional context
Gemspecs should be as lean as possible, and I feel it better to have the Cops ignore these gemspecs by default, and not having to extend my configuration either globally for large projects/custom configurations or to list this lien for every Cop