Bump proc-macro2 from 1.0.66 to 1.0.67 (#264) #510

Job	Run time
oxi-test (ruby=2.7, os=ubuntu-latest)	1m 34s
oxi-test (ruby=3.2, os=ubuntu-latest)	1m 18s
oxi-test (ruby=ruby-head, os=ubuntu-latest)	1m 33s
oxi-test (ruby=2.7, os=windows-latest)	6m 31s
oxi-test (ruby=3.2, os=windows-latest)	11m 5s
oxi-test (ruby=ruby-head, os=windows-latest)	8m 47s
oxi-test (ruby=2.7, os=macos-latest)	2m 24s
oxi-test (ruby=3.2, os=macos-latest)	2m 18s
oxi-test (ruby=ruby-head, os=macos-latest)	2m 8s
magnus-0.5 (ruby=2.7, os=ubuntu-latest)	3m 3s
magnus-0.5 (ruby=3.2, os=ubuntu-latest)	3m 12s
magnus-0.5 (ruby=ruby-head, os=ubuntu-latest)	2m 30s
magnus-0.5 (ruby=2.7, os=windows-latest)	11m 28s
magnus-0.5 (ruby=3.2, os=windows-latest)	13m 24s
magnus-0.5 (ruby=2.7, os=macos-latest)	2m 1s
magnus-0.5 (ruby=3.2, os=macos-latest)	1m 43s
magnus-0.5 (ruby=ruby-head, os=macos-latest)	1m 34s
magnus-head (ruby=2.7, os=ubuntu-latest)	3m 54s
magnus-head (ruby=3.2, os=ubuntu-latest)	3m 22s
magnus-head (ruby=ruby-head, os=ubuntu-latest)	3m 58s
magnus-head (ruby=2.7, os=windows-latest)	10m 17s
magnus-head (ruby=3.2, os=windows-latest)	15m 34s
magnus-head (ruby=2.7, os=macos-latest)	4m 5s
magnus-head (ruby=3.2, os=macos-latest)	4m 10s
magnus-head (ruby=ruby-head, os=macos-latest)	2m 22s
	2h 4m 15s

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