Reduce gem size by excluding test files

Author: yuri-zubov

creek.gemspec

@@ -12,9 +12,7 @@ Gem::Specification.new do |spec|
   spec.homepage      = 'https://github.com/pythonicrubyist/creek'
   spec.license       = 'MIT'
 
-  spec.files         = `git ls-files`.split($INPUT_RECORD_SEPARATOR)
-  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
-  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.files         = `git ls-files lib`.split($INPUT_RECORD_SEPARATOR) + %w(LICENSE.txt README.md)
   spec.require_paths = ['lib']
 
   spec.required_ruby_version = '>= 2.0.0'