[ruby/io-wait] update required_ruby_version
As d387029f39d976565c955377117103499d47ff09 made io/wait unbuildable with older versions, drop older versions tentatively. Also the change seems to instroduce behavioral incompatibilities, may address them or bump up the version later.
Added by nobu (Nobuyoshi Nakada) over 4 years ago
[ruby/io-wait] update required_ruby_version
As d387029f39d976565c955377117103499d47ff09 made io/wait
unbuildable with older versions, drop older versions tentatively.
Also the change seems to instroduce behavioral incompatibilities,
may address them or bump up the version later.