Gemfile.lock in ziptz-1.0.21 vs Gemfile.lock in ziptz-1.0.22

@@ -1,8 +1,8 @@
 PATH
   remote: .
   specs:
-    ziptz (1.0.20)
+    ziptz (1.0.21)
 
 GEM
   remote: https://rubygems.org/
   specs:
     activemodel (4.2.3)