.rubocop.yml in iecbib-0.2.1 vs .rubocop.yml in iecbib-0.2.2

@@ -1,4 +1,4 @@
 AllCops:
-  TargetRubyVersion: 2.4.0
+  TargetRubyVersion: 2.3.0
 Metrics/BlockLength:
-  ExcludedMethods: ['describe', 'context']
\ No newline at end of file
+  ExcludedMethods: ['describe', 'context']