Gemfile.lock in rails-acu-2.2.0 vs Gemfile.lock in rails-acu-3.0.0

@@ -5,11 +5,11 @@
     awesome_print (1.7.0)
 
 PATH
   remote: .
   specs:
-    rails-acu (2.2.0)
+    rails-acu (3.0.0)
       rails (~> 5.0.0, >= 5.0.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
@@ -70,11 +70,11 @@
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
-    mail (2.6.4)
+    mail (2.6.5)
       mime-types (>= 1.16, < 4)
     method_source (0.8.2)
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
@@ -113,28 +113,29 @@
       activesupport (= 5.0.2)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (12.0.0)
-    responders (2.3.0)
-      railties (>= 4.2.0, < 5.1)
-    rspec-core (3.5.4)
-      rspec-support (~> 3.5.0)
-    rspec-expectations (3.5.0)
+    responders (2.4.0)
+      actionpack (>= 4.2.0, < 5.3)
+      railties (>= 4.2.0, < 5.3)
+    rspec-core (3.6.0)
+      rspec-support (~> 3.6.0)
+    rspec-expectations (3.6.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-mocks (3.5.0)
+      rspec-support (~> 3.6.0)
+    rspec-mocks (3.6.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-rails (3.5.2)
+      rspec-support (~> 3.6.0)
+    rspec-rails (3.6.0)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
-      rspec-core (~> 3.5.0)
-      rspec-expectations (~> 3.5.0)
-      rspec-mocks (~> 3.5.0)
-      rspec-support (~> 3.5.0)
-    rspec-support (3.5.0)
+      rspec-core (~> 3.6.0)
+      rspec-expectations (~> 3.6.0)
+      rspec-mocks (~> 3.6.0)
+      rspec-support (~> 3.6.0)
+    rspec-support (3.6.0)
     sprockets (3.7.1)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.0)
       actionpack (>= 4.0)