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context.evalSync() within $0.applySyncPromise() executes promise handlers in the isolate

6

Which can lead to the following unexpected behaviour: ```js const isolate = new ivm.Isolate() const context = await isolate.createContext() await context.evalClosure( // language=JavaScript `this.runSyncPromise = () => $0.applySyncPromise()`, [() =>...

adds freezeCoreModules configuration option to mitigate memory leaks

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resolves #6399, resolves #6814 ## Summary Some commonly used libraries like [agent-base](https://github.com/TooTallNate/node-agent-base/blob/f892f87a6cb98137c10e14e40d914575e7f9c502/patch-core.js#L11) and [graceful-fs](https://github.com/isaacs/node-graceful-fs/blob/c7901c5ee8604f092d4acd056dce83d6e3bd4589/graceful-fs.js#L39) override node core modules' (a.k.a built-in modules) methods. This causes a memory leak in jest since...