!squash ci(test): CI --cov-append

Author: tony

setup.cfg

@@ -19,7 +19,7 @@ line_length = 88
 [tool:pytest]
 filterwarnings =
     ignore:.* Use packaging.version.*:DeprecationWarning::
-addopts = --tb=short --no-header --showlocals --doctest-modules --reruns 2 -p pytest_cov
+addopts = --tb=short --no-header --showlocals --doctest-modules --reruns 2 -p pytest_cov --cov-append
 doctest_optionflags = ELLIPSIS NORMALIZE_WHITESPACE
 testpaths =
 	libtmux