Refactor GitHub Actions ci.yml #1

Job	Run time
lint	27s
ci (3.1, faraday-2, ubuntu-latest)	44s
ci (3.1, faraday-1, ubuntu-latest)	46s
ci (3.1, faraday-2, macos-latest)	25s
ci (3.1, faraday-1, macos-latest)	27s
ci (3.2, faraday-1, ubuntu-latest)	46s
ci (3.3, faraday-1, macos-latest)	38s
ci (3.4, faraday-1, macos-latest)	29s
ci (3.3, faraday-2, ubuntu-latest)	56s
ci (3.3, faraday-1, ubuntu-latest)	44s
ci (3.2, faraday-2, macos-latest)	25s
ci (3.4, faraday-1, ubuntu-latest)	43s
ci (3.2, faraday-1, macos-latest)	48s
ci (3.2, faraday-2, ubuntu-latest)	45s
ci (3.3, faraday-2, macos-latest)	26s
ci (ruby-head, faraday-2, macos-latest)	30s
ci (ruby-head, faraday-2, ubuntu-latest)	45s
ci (truffleruby-head, faraday-2, macos-latest)	41s
ci (ruby-head, faraday-1, macos-latest)	38s
ci (truffleruby-head, faraday-2, ubuntu-latest)	1m 5s
ci (truffleruby-head, faraday-1, macos-latest)	48s
ci (truffleruby-head, faraday-1, ubuntu-latest)	1m 4s
ci (ruby-head, faraday-1, ubuntu-latest)	45s
ci (3.4, faraday-2, ubuntu-latest)	43s
ci (3.4, faraday-2, macos-latest)	27s
	16m 55s

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