Gemfile.lock in d_heap-0.2.1 vs Gemfile.lock in d_heap-0.2.2

@@ -1,17 +1,24 @@
 PATH
   remote: .
   specs:
-    d_heap (0.2.1)
+    d_heap (0.2.2)
 
 GEM
   remote: https://rubygems.org/
   specs:
+    ast (2.4.1)
     diff-lcs (1.4.4)
+    parallel (1.19.2)
+    parser (2.7.2.0)
+      ast (~> 2.4.1)
+    rainbow (3.0.0)
     rake (13.0.3)
     rake-compiler (1.1.1)
       rake
+    regexp_parser (1.8.2)
+    rexml (3.2.3)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
       rspec-mocks (~> 3.10.0)
     rspec-core (3.10.0)
@@ -21,17 +28,31 @@
       rspec-support (~> 3.10.0)
     rspec-mocks (3.10.0)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.0)
+    rubocop (1.2.0)
+      parallel (~> 1.10)
+      parser (>= 2.7.1.5)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8)
+      rexml
+      rubocop-ast (>= 1.0.1)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
+    rubocop-ast (1.1.1)
+      parser (>= 2.7.1.5)
+    ruby-progressbar (1.10.1)
+    unicode-display_width (1.7.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   d_heap!
   rake (~> 13.0)
   rake-compiler
   rspec (~> 3.10)
+  rubocop (~> 1.0)
 
 BUNDLED WITH
    2.2.3