Update all development Bundler dependencies (2019-08-05) (#4)

Author: depfu[bot]

Gemfile.lock

@@ -64,7 +64,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.2)
-    rubocop (0.73.0)
+    rubocop (0.74.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.6)