.rubocop.yml in tpm-key_attestation-0.4.0 vs .rubocop.yml in tpm-key_attestation-0.5.0

- old
+ new

@@ -1,6 +1,6 @@
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
   DisabledByDefault: true
   Exclude:
     - "gemfiles/**/*"
 
 Bundler: