Merge pull request #4033 from nobu/exclude-unused-files

Exclude CI files and issue templates from gems

bundler/lib/bundler/templates/newgem/newgem.gemspec.tt

@@ -25,7 +25,9 @@ Gem::Specification.new do |spec|
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
   spec.files = Dir.chdir(File.expand_path(__dir__)) do
-    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{\A(?:test|spec|features)/}) }
+    `git ls-files -z`.split("\x0").reject do |f|
+      f.match(%r{\A(?:(?:test|spec|features)/|\.(?:git|travis|circleci)|appveyor)})
+    end
   end
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }