.rubocop.yml in zeebe-client-0.17.0 vs .rubocop.yml in zeebe-client-0.18.0

- old
+ new

@@ -2,10 +2,10 @@
 inherit_mode:
   merge:
   - Exclude
 
 AllCops:
-  TargetRubyVersion: '2.5'
+  TargetRubyVersion: '2.7'
   NewCops: enable
   Exclude:
   - 'examples/*'
   - 'lib/zeebe/client/proto/*'
 