1.1.1:
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 * Hotfixes for PHP 8 (surrim)

1.1:
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 * Upgrade GeSHi to 1.0.9.0; minimal PHP version is now 7.0.

1.0: Another fix for PHP7.2 compatibility.

0.9.9: Fix constructor for compatibility with PHP7.2

0.7: Upgrade to Geshi 1.0.8.1