* Revert precise version upgrades from #343

This reverts commit 9e5a3ee0

* Use latest trybuild with fix

* CI troubleshoot: completely remove trybuild

* Revert "CI troubleshoot: completely remove trybuild"

This reverts commit 593b7183

* Restore trybuild deps

* CI troubleshoot: remove GIT_DEPTH

* CI troubleshoot: remove CARGO_HOME

* CI troubleshoot: revert deleting of CARGO_HOME

* CI troubleshoot: restore GIT_DEPTH and delete CARGO_HOME again

* CI troubleshoot: revert deleting of CARGO_HOME