21/merge on bash 4 #77

	name: test (bash 4)
	run-name: ${{ github.ref_name }} on bash 4
	on: [push, pull_request]
	env:
	bversion: 4
	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: true
	jobs:
	Test:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout the repo
	uses: actions/checkout@v4
	# We change the depth to find changed files.
	with:
	fetch-depth: 2
	- run: bash --version
	- name: Install bash
	run: ./src/internal/ci ci_install_bash $bversion
	- name: Print configuration
	run: ./src/internal/ci ci_config $bversion
	- name: Run tests
	run: ./src/internal/ci ci_test $bversion

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