• require event dispatcher to use reified generics.
• require listener providers to use reified generics.
• remove $event argument of IListenerProvider::getListeners() ( providers must use the T type instead of the object to determine listeners ) add support for immutable event objects.
• support only hhvm ~4.83.1 || ~4.84.0

• drop support for HHVM <= 4.83.0
• upgrade all dependencies
• switch from TravisCI to GitHub Actions

[+] Added Log contracts
[+] Added Translation contracts