remove python 3.7 which is eol #226

	# ref: https://github.com/actions/runner-images
	name: amd64 Linux Bazel

	on: [push, pull_request]

	jobs:
	# Building using the github runner environement directly.
	bazel:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ['3.8', '3.9', '3.10', '3.11']
	fail-fast: false
	env:
	CC: gcc-12
	CXX: g++-12
	steps:
	- uses: actions/checkout@v3
	- name: Check Java
	run: java -version
	- name: Setup Python
	uses: actions/setup-python@v3
	with:
	python-version: ${{ matrix.python-version }}
	- name: Check Python
	run: python --version
	- name: Install Bazel
	run: \|
	curl -fsSL https://bazel.build/bazel-release.pub.gpg \| gpg --dearmor > bazel.gpg
	sudo mv bazel.gpg /etc/apt/trusted.gpg.d/
	echo "deb [arch=amd64] https://storage.googleapis.com/bazel-apt stable jdk1.8" \| sudo tee /etc/apt/sources.list.d/bazel.list
	sudo apt-get update
	sudo apt-get install bazel
	- name: Check Bazel
	run: bazel version
	- name: Build
	run: >
	bazel build
	-c opt
	--action_env=BAZEL_CXXOPTS="-std=c++17"
	--subcommands=true
	ortools/... examples/...
	- name: Test
	run: >
	bazel test
	-c opt
	--action_env=BAZEL_CXXOPTS="-std=c++17"
	--test_output=errors
	ortools/... examples/...

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