Add has package

packages/has.rb

+require 'package'
+
+class Has < Package
+  description 'checks presence of various command line tools and their versions on the path'
+  homepage 'https://github.com/kdabir/has'
+  version '1.1.0'
+  source_url 'https://github.com/kdabir/has/archive/v1.1.0.tar.gz'
+  source_sha256 'e06d9674bc1b9281c1d4391ad4366d2ef249768e7b0ada304695bf954786e9c4'
+
+  binary_url ({
+  })
+  binary_sha256 ({
+  })
+
+  def self.install
+    system "install -Dm755 has #{CREW_DEST_PREFIX}/bin/has"
+  end
+end