stop relying on process._fatalException

[isaacs]

Since node 16, the approach used here has been causing C++ assertion errors and stack dumps in some cases when handling a rejected promise.

$ node --unhandled-rejections=strict test/fixtures/promise-rejections.js
CAUGHT unhandledRejection happy
node[33732]: ../src/api/callback.cc:141:void node::InternalCallbackScope::Close(): Assertion `(env_->execution_async_id()) == (0)' failed.
 1: 0x10010a200 node::Abort() [/usr/local/bin/node]
 2: 0x10010a040 node::AppendExceptionLine(node::Environment*, v8::Local<v8::Value>, v8::Local<v8::Message>, node::ErrorHandlingMode) [/usr/local/bin/node]
 3: 0x100054d8c node::InternalCallbackScope::Close() [/usr/local/bin/node]
 4: 0x1000547c4 node::InternalCallbackScope::~InternalCallbackScope() [/usr/local/bin/node]
 5: 0x1000b19d4 node::Environment::RunAndClearNativeImmediates(bool) [/usr/local/bin/node]
 6: 0x1000b12d8 node::Environment::CheckImmediate(uv_check_s*) [/usr/local/bin/node]
 7: 0x100a22b9c uv__run_check [/usr/local/bin/node]
 8: 0x100a1c8f8 uv_run [/usr/local/bin/node]
 9: 0x1000556d4 node::SpinEventLoop(node::Environment*) [/usr/local/bin/node]
10: 0x100145128 node::NodeMainInstance::Run() [/usr/local/bin/node]
11: 0x1000d8ec8 node::LoadSnapshotDataAndRun(node::SnapshotData const**, node::InitializationResult const*) [/usr/local/bin/node]
12: 0x1000d9190 node::Start(int, char**) [/usr/local/bin/node]
13: 0x1a802fe50 start [/usr/lib/dyld]
Abort trap: 6

• drop support for node versions lacking the new interfaces
• Listen on process.on('uncaughtExceptionMonitor') to detect when an error is about to be raised to the top level
• If we should handle it (ie, a domain is active) then call process.setUncaughtExceptionCaptureCallback(fn) to capture errors in the domain system, and immediately remove it with process.setUncaughtExceptionCaptureCallback(null) once handled.

[isaacs]

Moving new support level to node >=14 is probably a good idea for plenty of other reasons, and it has all the requisite methods and events.

[isaacs]

fixed on v3