Add license

Author: waiting-for-dev

web_pipe.gemspec

@@ -12,6 +12,7 @@ Gem::Specification.new do |spec|
 
   spec.summary       = 'Rack application builder through a pipe of operations on an immutable struct.'
   spec.homepage      = 'https://github.com/waiting-for-dev/web_pipe'
+  spec.licenses      = ['MIT']
 
   # Prevent pushing this gem to RubyGems.org. To allow pushes either set the 'allowed_push_host'
   # to allow pushing to a single host or delete this section to allow pushing to any host.