Gemfile in d_heap-0.3.0 vs Gemfile in d_heap-0.4.0

@@ -3,9 +3,10 @@
 source "https://rubygems.org"
 
 # Specify your gem's dependencies in d_heap.gemspec
 gemspec
 
+gem "pry"
 gem "rake", "~> 13.0"
 gem "rake-compiler"
 gem "rspec", "~> 3.10"
 gem "rubocop", "~> 1.0"