Bump step-security/harden-runner from 2.16.0 to 2.16.1

Fix RuboCop offenses

Fix NoMethodError in CommandGuesser parallel_data

Support parallel_tests with multiple commands

Make StringFilter match at path-segment boundaries

Fix branch coverage cucumber feature to match new output format

check coverage output to stdout

Move rubocop to a dedicated lint CI workflow

Remove docile dependency

Merge simplecov_json_formatter into simplecov

Update screenshots in the README

Fix tab bar layout and add assets:compile rake task

Merge simplecov-html into simplecov

Update rack, parallel, and minitest dependencies

Fix misleading 100% branch/method coverage for unloaded tracked files