.rubocop.yml in osso-0.0.3.16 vs .rubocop.yml in osso-0.0.3.17

@@ -1,5 +1,6 @@
 AllCops:
+  TargetRubyVersion: 2.6.0
   Exclude:
     - db/**/*
     - lib/osso/db/**/*
 
 # New rules must be explicitly opted into / out of
\ No newline at end of file