statelyai/xstate xstate@4.7.7 on GitHub

c8db035 #936 Thanks @davidkpiano! - The escalate() action can now take in an expression, which will be evaluated against the context, event, and meta to return the error data.
2a3fea1 #952 Thanks @davidkpiano! - The typings for the raise() action have been fixed to allow any event to be raised. This typed behavior will be refined in version 5, to limit raised events to those that the machine accepts.
f86d419 #957 Thanks @Andarist! - Fixed memory leak - each created service has been registered in internal map but it was never removed from it. Registration has been moved to a point where Interpreter is being started and it's deregistered when it is being stopped.