Add codecov support

.github/workflows/test.yaml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python: [2.7, 3.5, 3.6, 3.7, 3.8]
+        python: [2.7, 3.5, 3.6, 3.7, 3.8, 3.9]
 
     steps:
       - uses: actions/checkout@v2
@@ -22,7 +22,10 @@ jobs:
         run: |
           tox -e pylint
           tox -e py
-      - name: Codecov
-        if: matrix.python == 3.7 && matrix.os == 'ubuntu-latest'
-        run: |
-          tox -e codecov
+      - uses: codecov/codecov-action@v1
+        if: matrix.os == 'ubuntu-latest'
+        with:
+          file: ./coverage.xml # optional
+          name: py${{ matrix.python-version }}-${{ matrix.env.TOXENV }}-${{ matrix.os }}
+          flags: unittests # optional
+          fail_ci_if_error: true # optional (default = false)

tox.ini

@@ -5,6 +5,7 @@ envlist = py{27,34,35,36,37,38},pylint
 commands =
   pip install -e .
   coverage run -m unittest discover -s {posargs:test}
+  coverage xml
 skip_install = True
 deps =
   mock
@@ -13,21 +14,6 @@ deps =
 setenv =
   LANG=en_US.UTF-8
   AWS_DEFAULT_REGION=us-east-1
-  COVERAGE_FILE = {env:COVERAGE_FILE:.coverage.{envname}}
-
-[testenv:codecov]
-deps =
-  coverage
-  codecov
-skip_install = True
-passenv = CI TRAVIS TRAVIS_*
-setenv =
-  COVERAGE_FILE=.coverage
-commands =
-  coverage erase
-  coverage combine
-  coverage report
-  codecov
 
 [testenv:pylint]
 deps =