GitHub Actions: upgrade to Python 3.9

Signed-off-by: Nicolas Iooss <[email protected]>

.github/workflows/run_tests.yml

@@ -10,25 +10,26 @@ jobs:
  matrix:
  compiler: [gcc, clang]
  python-ruby-version:
- - {python: 3.8, ruby: 2.7}
- - {python: 3.8, ruby: 2.7, other: test-flags-override}
- - {python: 3.8, ruby: 2.7, other: test-debug}
- - {python: 3.8, ruby: 2.7, other: linker-bfd}
- - {python: 3.8, ruby: 2.7, other: linker-gold}
+ - {python: 3.9, ruby: 2.7}
+ - {python: 3.9, ruby: 2.7, other: test-flags-override}
+ - {python: 3.9, ruby: 2.7, other: test-debug}
+ - {python: 3.9, ruby: 2.7, other: linker-bfd}
+ - {python: 3.9, ruby: 2.7, other: linker-gold}
  # Test several Python versions with the latest Ruby version
+ - {python: 3.8, ruby: 2.7}
  - {python: 3.7, ruby: 2.7}
  - {python: 3.6, ruby: 2.7}
  - {python: 3.5, ruby: 2.7}
  - {python: pypy3, ruby: 2.7}
  # Test several Ruby versions with the latest Python version
- - {python: 3.8, ruby: 2.6}
- - {python: 3.8, ruby: 2.5}
- - {python: 3.8, ruby: 2.4}
+ - {python: 3.9, ruby: 2.6}
+ - {python: 3.9, ruby: 2.5}
+ - {python: 3.9, ruby: 2.4}
  exclude:
  - compiler: clang
- python-ruby-version: {python: 3.8, ruby: 2.7, other: linker-bfd}
+ python-ruby-version: {python: 3.9, ruby: 2.7, other: linker-bfd}
  - compiler: clang
- python-ruby-version: {python: 3.8, ruby: 2.7, other: linker-gold}
+ python-ruby-version: {python: 3.9, ruby: 2.7, other: linker-gold}
 
  steps:
  - uses: actions/checkout@v2