Bump rubocop from 1.12.0 to 1.38.0#52

dependabot[bot] wants to merge 1 commit intomasterAltSchool/heroku-buildpack-python:masterfrom

dependabot/bundler/rubocop-1.38.0AltSchool/heroku-buildpack-python:dependabot/bundler/rubocop-1.38.0Copy head branch name to clipboard