tic 0.12.0

• Update Circle CI templates to 2022-03-01
  • Remove ccache parts
  • Run nightly builds also on main branch
• Update GHA and Circle CI templates to 2022-03-01
  • Update to setup-tinytex@v2
  • Update to setup-r@v2
  • Update to setup-pandoc@v2
  • Update to checkout@v3
• Only run one set of runners in pull requests. Previously, runners were triggered both by commits to a branch and the respective pull request
• Fixed a bug in update_yml() which updated the wrong CI config file in certain situations