Change 'print' to 'say'

And add the necessary 'use v5.10' for that, which carries the additional
advantage of enabling 'use strict'.

glv.pl

@@ -1,11 +1,12 @@
 #!/usr/bin/env perl
 
+use v5.10;
 my $all = $ARGV[0] =~ /^-a|--all$/ ? 1 : 0;
 my @lines = `curl "https://gitlab.com/gitlab-org/gitlab-foss/-/raw/master/CHANGELOG.md" 2>/dev/null`;
 
 for (@lines) {
     if (/^##\s+(\d+\.\d+\.\d+)\s+\((\d+-\d+-\d+)/) {
-        print "$1 [$2]\n";
+        say "$1 [$2]";
         unless ($all) {
             last;
         }