Extract Racc::VERSION from racc/info.rb at extconf.rb #5

Job	Run time
ruby-versions / Generate Ruby versions	3s
test (2.5, ubuntu-latest)	33s
test (2.5, macos-latest)	1m 11s
test (2.5, windows-latest)	2m 51s
test (2.6, ubuntu-latest)	41s
test (2.6, macos-latest)	1m 8s
test (2.6, windows-latest)	3m 55s
test (2.7, ubuntu-latest)	43s
test (2.7, macos-latest)	1m 17s
test (2.7, windows-latest)	2m 22s
test (3.0, ubuntu-latest)	19s
test (3.0, macos-latest)	42s
test (3.0, windows-latest)	1m 34s
test (3.1, ubuntu-latest)	20s
test (3.1, macos-latest)	28s
test (3.1, windows-latest)	1m 50s
test (3.2, ubuntu-latest)	30s
test (3.2, macos-latest)	49s
test (3.2, windows-latest)	3m 39s
test (head, ubuntu-latest)	36s
test (head, macos-latest)	35s
test (head, windows-latest)	1m 54s
test (jruby, ubuntu-latest)	7m 3s
test (jruby-head, ubuntu-latest)	5m 41s
test (truffleruby, ubuntu-latest)	3m 14s
test (truffleruby-head, ubuntu-latest)	4m 31s
	48m 29s

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