Make VM freezable to support async callbacks
Make VM freezable to support async callbacks

the-impossible-quiz-revisited/the-impossible-quiz-revisited.github.io,fmateoc/SqueakJS,fniephaus/SqueakJS,the-impossible-quiz-revisited/the-impossible-quiz-revisited.github.io,fmateoc/SqueakJS,sebastianconcept/SqueakJS,bertfreudenberg/SqueakJS,sebastianconcept/SqueakJS,Speed-Pad/online,Speed-Pad/online,bertfreudenberg/SqueakJS,the-impossible-quiz-revisited/the-impossible-quiz-revisited.github.io,the-impossible-quiz-revisited/the-impossible-quiz-revisited.github.io,fniephaus/SqueakJS,bertfreudenberg/SqueakJS,fniephaus/SqueakJS,fniephaus/SqueakJS,sebastianconcept/SqueakJS,fmateoc/SqueakJS,fmateoc/SqueakJS,bertfreudenberg/SqueakJS,Speed-Pad/online