Update dependency rubocop-rspec to v3.4.0

Author: renovate[bot]

Gemfile.lock

@@ -119,7 +119,7 @@ GEM
     open4 (1.3.4)
     ostruct (0.6.1)
     parallel (1.26.3)
-    parser (3.3.6.0)
+    parser (3.3.7.0)
       ast (~> 2.4.1)
       racc
     pry (0.15.2)
@@ -163,7 +163,7 @@ GEM
       parser (>= 3.3.1.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
-    rubocop-rspec (3.3.0)
+    rubocop-rspec (3.4.0)
       rubocop (~> 1.61)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)