Update CI configuration #224

Job	Run time
Tests (ubuntu-latest, 4.03.0)	10m 44s
Tests (ubuntu-latest, 4.04.0)	10m 26s
Tests (ubuntu-latest, 4.05.0)	10m 11s
Tests (ubuntu-latest, 4.06.0)	10m 37s
Tests (ubuntu-latest, 4.07.0)	8m 42s
Tests (ubuntu-latest, 4.08.0)	6m 59s
Tests (ubuntu-latest, 4.09.0)	7m 12s
Tests (ubuntu-latest, ocaml-variants.4.11.2+fp+flambda)	8m 24s
Tests (ubuntu-latest, 4.11.1)	7m 4s
Tests (ubuntu-latest, 4.12.0)	6m 41s
Tests (ubuntu-latest, 4.13.1)	7m 4s
Tests (ubuntu-latest, 4.14.0)	7m 14s
Tests (ubuntu-latest, 5.0.0)	6m 57s
Tests (ubuntu-latest, 5.1.0)	7m 28s
Tests (ubuntu-latest, 5.2.0)	7m 11s
Tests (windows-latest, 4.13.1)	8m 35s
Tests (macos-latest, 4.13.1)	7m 9s
	2h 18m 38s

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