This is the last version compatible with TYPO3 v9.

[BUGFIX] Assure character substitution in all contexts (32)
[TASK] Use new hook for character substitution
[BUGFIX] Assure TYPO3 v9 compatibility for updated hook (36)
[BUGFIX] Avoid output of link text after successful character substitution (37)
[TASK] Improve documentation (README.md)