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

...
    version   '1.2.36'
    baz

$ cat wtf.pl
#!/usr/bin/perl
...

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

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

    foo
    version   '1.2.37'
    baz