Gemfile.lock in lamby-4.1.1 vs Gemfile.lock in lamby-4.2.0

@@ -1,9 +1,9 @@
 PATH
   remote: .
   specs:
-    lamby (4.1.1)
+    lamby (4.2.0)
       rack
 
 GEM
   remote: https://rubygems.org/
   specs:
@@ -168,10 +168,11 @@
     ruby2_keywords (0.0.5)
     thor (1.2.1)
     timeout (0.3.2)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
+    webrick (1.8.1)
     websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     zeitwerk (2.6.7)
 
@@ -187,8 +188,9 @@
   minitest-focus
   mocha
   pry
   rails
   rake
+  webrick
 
 BUNDLED WITH
    2.3.26