update dependency to Ruby 2.5+

We actually need Ruby 2.3+ for `accept_nonblock(exception: false)';
and (AFAIK) we can't easily use a subclass of `Socket' while using
Socket#accept_nonblock to inject WriteSplat support for
`IO#write(*multi_args)'

So just depend on Ruby 2.5+ since all my Ruby is already on the
already-ancient Ruby 2.7+ anyways.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/README b/t/README
index d09c715..7bd093d 100644
--- a/t/README
+++ b/t/README
@@ -14,7 +14,7 @@ Old tests are in Bourne shell and slowly being ported to Perl 5.
 
 == Requirements
 
-* {Ruby 2.0.0+}[https://www.ruby-lang.org/en/]
+* {Ruby 2.5.0+}[https://www.ruby-lang.org/en/]
 * {Perl 5.14+}[https://www.perl.org/] # your distro should have it
 * {GNU make}[https://www.gnu.org/software/make/]
 * {curl}[https://curl.haxx.se/]