install Rust on FreeBSD

Author: duckinator

.cirrus.yml

@@ -60,6 +60,7 @@ FreeBSD_task:
   install_script:
     - PY=`echo $PYTHON | tr -d '.'`
     - pkg install -y python${PY} py${PY}-setuptools
+    - pkg install -y rust # https://github.com/duckinator/bork/issues/390
     - python${PYTHON} -m ensurepip --upgrade
     - python${PYTHON} -m pip install -U 'pip>=19' # Hard requirement for no setup.py.
     - python${PYTHON} -m pip install .[test]