Gemfile in botkit-0.0.5 vs Gemfile in botkit-0.0.6

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 source "https://rubygems.org"
 
 git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
 # Specify your gem's dependencies in botkit.gemspec