$ cat wtf.pl
#!/usr/bin/perl
use 5.010;
use strict;
use warnings;

while (<>) {
  next unless /version/;
  my ($version) = /version \s+ '(\d+[.]\d+[.]\d+)'/msx;
  say $version;
}

$ printf "foo\nversion   '1.2.36'\nbaz\n" | perl wtf.pl
1.2.36