Add codespell to linter.

.github/workflows/linttest.yml

@@ -24,7 +24,7 @@ jobs:
         run: |
           sudo apt-get update -q
           sudo apt-get install intltool desktop-file-utils
-          pip3 install pytest-cov minimock pycodestyle isort requests pytest pytest-httpserver
+          pip3 install pytest-cov minimock pycodestyle isort codespell requests pytest pytest-httpserver
           pip3 install podcastparser mygpoclient
       - name: Lint
         run: make lint

makefile

@@ -70,6 +70,7 @@ ISORTOPTS := -c share src/gpodder tools bin/* *.py
 lint:
 	pycodestyle share src/gpodder tools bin/* *.py
 	isort -q $(ISORTOPTS) || isort --df $(ISORTOPTS)
+	codespell --quiet-level 3 --skip "./.git,*.po,./share/applications/gpodder.desktop"
 
 release: distclean
 	$(PYTHON) setup.py sdist