Add .rubocop.yml config

Author: CAMOBAP

.rubocop.yml

@@ -0,0 +1,6 @@
+# This project follows the Ribose OSS style guide.
+# https://github.com/riboseinc/oss-guides
+# All project-specific additions and overrides should be specified in this file.
+
+inherit_from:
+  - https://raw.githubusercontent.com/riboseinc/oss-guides/master/ci/rubocop.yml