Runs nightly tests on maintenance branches #399

Job	Run time
Run tests of branch 5.0.x on ubuntu-latest with Node 10	1m 19s
Run tests of branch 5.0.x on ubuntu-latest with Node 18	1m 16s
Run tests of branch 5.0.x on windows-latest with Node 10	2m 18s
Run tests of branch 5.0.x on windows-latest with Node 18	2m 42s
Run tests of branch 4.2.x on ubuntu-latest with Node 10	1m 8s
Run tests of branch 4.2.x on ubuntu-latest with Node 18	1m 9s
Run tests of branch 4.2.x on windows-latest with Node 10	2m 43s
Run tests of branch 4.2.x on windows-latest with Node 18	3m 0s
Run tests of branch 4.1.x on ubuntu-latest with Node 10	47s
Run tests of branch 4.1.x on ubuntu-latest with Node 18	43s
Run tests of branch 4.1.x on windows-latest with Node 10	1m 59s
Run tests of branch 4.1.x on windows-latest with Node 18	55s
Run tests of branch 4.0.x on ubuntu-latest with Node 10	41s
Run tests of branch 4.0.x on ubuntu-latest with Node 18	46s
Run tests of branch 4.0.x on windows-latest with Node 10	1m 26s
Run tests of branch 4.0.x on windows-latest with Node 18	1m 4s
	23m 56s

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