printf "foo\nversion   '1.2.36'\nbaz\n" | perl -MData::Dumper -pi -e "next unless /version/; ($version) = /version\s+('1\.2\.36')/; print $version"

    foo
    version   '1.2.36'
    version   '1.2.36'
    baz

printf "foo\nversion   '1.2.36'\nbaz\n" | perl -MData::Dumper -pi -e "next unless /version/; ($version) = /version\s+('1\.2\.36')/; print Dumper $version"
 
    foo
    version   '1.2.36'
    baz

printf "foo\nversion   '1.2.36'\nbaz\n" | perl -MData::Dumper -pi -e "next unless /version/; ($version) = /version\s+('1\.2\.36')/; print Dumper \$version"

    foo
    $VAR1 = undef;
    version   '1.2.36'
    baz

printf "foo\nversion   '1.2.36'\nbaz\n" | perl -pi -e 'next unless /version/; ($version) = $_ =~ m{ version \s+ ''(1[.]2[.]36)'' }xms; print "version:" . $version . "\n"'

    foo
    version:
    version   '1.2.36'
    baz


##</code><code>##

$ 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

##</code><code>##

printf "foo\nversion   '1.2.36'\nbaz\n" | perl -pi -e 'if ($_ =~ m/version\s+.\d+[.]\d+[.](\d+)/) { my $v1 = quotemeta $1; my $v2 = $1 + 1; $_ =~ s/$v1/$v2/ }'

    foo
    version   '1.2.37'
    baz