enable lexical subs before perl v5.26

Introduced in perl v5.18 and experimental until recently.

diff --git a/graph b/graph
index c4ebd20449a02f99205d59cc5968fe7327d83e36..307c9e41d47bfc031ad0e897ee120d4c9c3a19f4 100755 (executable)
--- a/graph
+++ b/graph
@@ -1,9 +1,10 @@
 #!/usr/bin/env perl
-use 5.014;
+use 5.018;
 use warnings;
 use utf8;
 use List::Util qw( min max sum );
 use open qw( :std :utf8 );
+use experimental qw( lexical_subs );
 
 our $VERSION = '1.02';