Gemfile.lock in d_heap-0.5.0 vs Gemfile.lock in d_heap-0.6.0

- old
+ new

@@ -1,17 +1,24 @@
 PATH
   remote: .
   specs:
-    d_heap (0.5.0)
+    d_heap (0.6.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.1)
     benchmark_driver (0.15.16)
+    benchmark_driver-output-gruff (0.3.1)
+      benchmark_driver (>= 0.12.0)
+      gruff
     coderay (1.1.3)
     diff-lcs (1.4.4)
+    gruff (0.12.1)
+      histogram
+      rmagick
+    histogram (0.2.4.1)
     method_source (1.0.0)
     parallel (1.19.2)
     parser (2.7.2.0)
       ast (~> 2.4.1)
     perf (0.1.2)
@@ -23,10 +30,11 @@
     rake (13.0.3)
     rake-compiler (1.1.1)
       rake
     regexp_parser (1.8.2)
     rexml (3.2.3)
+    rmagick (4.1.2)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
       rspec-mocks (~> 3.10.0)
     rspec-core (3.10.0)
@@ -57,9 +65,10 @@
 PLATFORMS
   ruby
 
 DEPENDENCIES
   benchmark_driver
+  benchmark_driver-output-gruff
   d_heap!
   perf
   priority_queue_cxx
   pry
   rake (~> 13.0)