Gemfile.lock in belated-0.5.4 vs Gemfile.lock in belated-0.5.5

@@ -1,11 +1,12 @@
 PATH
   remote: .
   specs:
-    belated (0.5.4)
+    belated (0.5.5)
       drb
       dry-configurable
+      sorted_set
 
 GEM
   remote: https://rubygems.org/
   specs:
     actioncable (6.1.4)
@@ -133,10 +134,11 @@
       method_source
       rake (>= 0.13)
       thor (~> 1.0)
     rainbow (3.0.0)
     rake (13.0.6)
+    rbtree (0.4.4)
     regexp_parser (2.1.1)
     rexml (3.2.5)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
       rspec-expectations (~> 3.10.0)
@@ -171,9 +173,13 @@
       parser (>= 3.0.1.1)
     rubocop-performance (1.11.4)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
     ruby-progressbar (1.11.0)
+    set (1.0.1)
+    sorted_set (1.0.3)
+      rbtree
+      set (~> 1.0)
     sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.2)
       actionpack (>= 4.0)