Bump php-rnp version after improvements from Remi Collet

[ronaldtse]

@antonsviridenko we need to bump the php-rnp version after improvements received from Remi:

• 4

• 5

[antonsviridenko]

@ronaldtse New release is uploaded https://github.com/rnpgp/php-rnp/releases/download/v0.2.0/rnp-0.2.0.tgz sha256sum rnp-0.2.0.tgz

4946bbd2ac3ce6415d965369611fe800f90833cb1966eb53506ae936182dbfa4  rnp-0.2.0.tgz

You can now try to upload the package to PECL.

[ronaldtse]

Done, thank you!