include windows coverage (#13587)

* try out proposed windows coverage combining fix

* Add [paths]

* diagnostics

* more complete paths section

* --only core.cmds

* Update test.yml

* Update test.yml

* --debug=pathmap

* ini-form

* Remove [paths]

* remove some debug

* remove --only core/cmds

* Update setup.py

* coverage[toml]==7.0.0b1

* coverage[toml]~=7.0

.github/workflows/test.yml

@@ -127,8 +127,6 @@ jobs:
 
       - name: Coverage Processing
         run: |
-          # skip windows until https://github.com/nedbat/coveragepy/issues/991 is resolved
-          rm coverage-data/*.tests_windows_* coverage-data/.*.tests_windows_*
           coverage combine --rcfile=.coveragerc --data-file coverage-reports/.coverage coverage-data/
           coverage xml --rcfile=.coveragerc --data-file coverage-reports/.coverage -o coverage-reports/coverage.xml
           coverage html --rcfile=.coveragerc --data-file coverage-reports/.coverage --directory coverage-reports/html/