Gemfile.lock in buildkite-test_collector-2.1.0.pre vs Gemfile.lock in buildkite-test_collector-2.1.0

@@ -1,11 +1,10 @@
 PATH
   remote: .
   specs:
-    buildkite-test_collector (2.1.0.pre)
+    buildkite-test_collector (2.1.0)
       activesupport (>= 4.2)
-      websocket (~> 1.2)
 
 GEM
   remote: https://rubygems.org/
   specs:
     activesupport (7.0.4.3)
@@ -32,10 +31,9 @@
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
     rspec-support (3.10.3)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    websocket (1.2.9)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES