Update rubocop-rails to version 2.25.1

Gemfile.lock

@@ -143,7 +143,7 @@ GEM
       faraday-multipart (~> 1.0, >= 1.0.4)
     cocoon (1.2.15)
     colorize (1.1.0)
-    concurrent-ruby (1.3.1)
+    concurrent-ruby (1.3.3)
     countable-rails (0.0.1)
       railties (>= 3.1)
     crack (1.0.0)
@@ -289,7 +289,7 @@ GEM
     mini_magick (4.12.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
-    minitest (5.23.1)
+    minitest (5.24.1)
     monetize (1.13.0)
       money (~> 6.12)
     money (6.19.0)
@@ -488,7 +488,7 @@ GEM
     rubocop-performance (1.21.1)
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rails (2.24.1)
+    rubocop-rails (2.25.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)