Add support for JavaScriptCore

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Reduce the application footprint by utilizing the JavaScriptCore.framework bundled with macOS/iOS, and support remote debugging in Safari.

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JS_EXPORT void JSGlobalContextSetUnhandledRejectionCallback(JSGlobalContextRef ctx, JSObjectRef function, JSValueRef* exception) JSC_API_AVAILABLE(macos(10.15.4), ios(13.4));

JS_EXPORT JSStringRef JSContextCreateBacktrace(JSContextRef ctx, unsigned maxStackSize) JSC_API_AVAILABLE(macos(10.6), ios(7.0));

JS_EXPORT void JSContextGroupSetExecutionTimeLimit(JSContextGroupRef group, double limit, JSShouldTerminateCallback callback, void* context) JSC_API_AVAILABLE(macos(10.6), ios(7.0));

JS_EXPORT JSGlobalContextRef JSObjectGetGlobalContext(JSObjectRef object);

JS_EXPORT void JSContextGroupAddHeapFinalizer(JSContextGroupRef, JSHeapFinalizer, void *userData);

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JSValueToUInt32 (15.0+)
JSValueToInt32 (15.0+)
JSValueIsBigInt (15.0+)
JSValueToInt64 (15.0+)
JSBigIntCreateWithInt64 (15.0+)
JSGlobalContextSetInspectable (13.3+)