Merge pull request matplotlib#15447 from anntzer/py38travis

CI: Move testing of Py3.8 to Travis.

Author: tacaswell

.travis.yml

@@ -97,7 +97,6 @@ matrix:
           - $HOME/.ccache  # https://github.com/travis-ci/travis-ci/issues/5853
           - $HOME/.cache/matplotlib
   allow_failures:
-    - python: "nightly"
 
 before_install: |
   case "$TRAVIS_OS_NAME" in

ci/azure-pipelines-steps.yml

@@ -57,30 +57,24 @@ steps:
         texlive-xetex texlive-luatex
     displayName: 'Install dependencies with apt'
 
-- script: |
-
+- bash: |
     python -m pip install --upgrade pip
-    pip install -r requirements/testing/travis_all.txt -r requirements/testing/travis36.txt
-
+    pip install -r requirements/testing/travis_all.txt -r requirements/testing/travis36.txt ||
+      [[ "$PYTHON_VERSION" = 'Pre' ]]
   displayName: 'Install dependencies with pip'
 
-- script: |
-
-    pip install -ve .
-
+- bash: |
+    MPLLOCALFREETYPE=1 pip install -ve . ||
+      [[ "$PYTHON_VERSION" = 'Pre' ]]
   displayName: "Install self"
-  env:
-    MPLLOCALFREETYPE: 1
 
 - script: env
   displayName: 'print env'
 
-- script: |
-    env
-    pytest --junitxml=junit/test-results.xml -raR --maxfail=50 --timeout=300 --durations=25 --cov-report= --cov=lib -n 2
+- bash: |
+    PYTHONFAULTHANDLER=1 pytest --junitxml=junit/test-results.xml -raR --maxfail=50 --timeout=300 --durations=25 --cov-report= --cov=lib -n 2 ||
+      [[ "$PYTHON_VERSION" = 'Pre' ]]
   displayName: 'pytest'
-  env:
-    PYTHONFAULTHANDLER: 1
 
 - task: PublishTestResults@2
   inputs: