1.2.0 Add missing directives

What's Changed

• [1.x] [FEATURE] Support math directive by @phpdoc-bot in #938
• [1.x] [FEATURE] Support basic glossary directive by @phpdoc-bot in #939
• [1.x] [FEATURE] Support math directive by @phpdoc-bot in #940
• [1.x] [FEATURE] Support Parsed Literal Block by @phpdoc-bot in #941

Full Changelog: 1.1.1...1.2.0