ci: Require 90% code coverage

Primarily to catch if the coverage accidentally falls to 0%.

Author: davidparsson

pytest.ini

@@ -1,3 +1,3 @@
 [pytest]
-addopts = -v --tb=native --doctest-glob=*.md --doctest-modules --cov-report term --cov-report html --cov-report xml --cov=injector --cov-branch
+addopts = -v --tb=native --doctest-glob=*.md --doctest-modules --cov-report term --cov-report html --cov-report xml --cov=injector --cov-branch --cov-fail-under=90
 norecursedirs = __pycache__ *venv* .git build