I Can Download Mediawiki 1.30.0 without Paying Money ? Because I have no money for Mediawiki 1.30.0
Topic on Talk:Download
Quoting Download:
MediaWiki is free software licensed under version 2 of the GNU General Public License. Because MediaWiki is licensed free of charge, there is no warranty, to the extent permitted by applicable law. Read the full text of the GNU GPL version 2 for details.
(Emphasis mine)
And, you should download MediaWiki 1.31, not MediaWiki 1.30.