PR #72 has introduced a minimum Ruby version requirement of v2.7

[fallwith]

#72's use of array[..n]:

return @read_buffer[..([size, @read_buffer.size].min - 1)]

won't work with Rubies older than 2.7.

We'll need to either refactor to support Ruby 2.5 and 2.6, or bump the required_ruby_version value in asycn-io.gemspec accordingly.

[ioquatix]

Ah sorry about that. I’ll bump the minimum supported version in the gemspec.

[ioquatix]

Okay, it was an easy fix to restore compatibility, so I've done that.

[ioquatix]

Sorry, messed up the cross referencing. This was fixed in #75.