Gemfile.lock in signalize-1.0.1 vs Gemfile.lock in signalize-1.1.0

@@ -1,13 +1,15 @@
 PATH
   remote: .
   specs:
-    signalize (1.0.1)
+    signalize (1.1.0)
+      concurrent-ruby (~> 1.2)
 
 GEM
   remote: https://rubygems.org/
   specs:
     coderay (1.1.3)
+    concurrent-ruby (1.2.2)
     ffi (1.15.5)
     formatador (1.1.0)
     guard (2.18.0)
       formatador (>= 0.2.4)
       listen (>= 2.7, < 4.0)