[WIP] Update rubocop dependency to mitigate security vulnerability

[lisac-usds]

RuboCop 0.48.1 and earlier does not use /tmp in safe way

reference :

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8418
• https://github.com/bbatsov/rubocop/issues/4336