port docs and docs-linkcheck (#5563)

* port docs and docs-linkcheck

* allow linkcheck if the commit msg says linkcheck

combine docs job into lint jobs

* can't get the commit msg at this time on a PR

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         PYTHON:
-          - {VERSION: "3.9", TOXENV: "pep8,packaging", COVERAGE: "false"}
+          - {VERSION: "3.9", TOXENV: "pep8,packaging,docs", COVERAGE: "false"}
           - {VERSION: "pypy2", TOXENV: "pypy-nocoverage", COVERAGE: "false"}
           - {VERSION: "pypy3", TOXENV: "pypy3-nocoverage", COVERAGE: "false"}
           - {VERSION: "2.7", TOXENV: "py27", OPENSSL: {TYPE: "openssl", VERSION: "1.1.0l"}}
@@ -230,3 +230,18 @@ jobs:
       - run: ./.github/downstream.d/${{ matrix.DOWNSTREAM }}.sh install
       - run: pip install .
       - run: ./.github/downstream.d/${{ matrix.DOWNSTREAM }}.sh run
+
+  docs-linkcheck:
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    runs-on: ubuntu-latest
+    name: "linkcheck"
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+      - run: python -m pip install -U tox
+      - run: tox -r --  --color=yes
+        env:
+          TOXENV: docs-linkcheck

.travis.yml

@@ -19,16 +19,6 @@ branches:
 matrix:
     include:
         # Setting 'python' is just to make travis's UI a bit prettier
-        - python: 3.8
-          env: TOXENV=docs
-          addons:
-              apt:
-                  packages:
-                      - libenchant-dev
-        - python: 3.8
-          env: TOXENV=docs-linkcheck
-          if: (branch = master AND type != pull_request) OR commit_message =~ /linkcheck/
-
         # TODO: This needs to be moved to GHA, but it fails there. The
         # confusing part is why it passes on Travis!
         - python: 3.7