chore: migrate code to ESM (#73)

node_modules/undici/lib/api/abort-signal.js

@@ -1,57 +0,0 @@
-const { RequestAbortedError } = require('../core/errors')
-
-const kListener = Symbol('kListener')
-const kSignal = Symbol('kSignal')
-
-function abort (self) {
-  if (self.abort) {
-    self.abort()
-  } else {
-    self.onError(new RequestAbortedError())
-  }
-}
-
-function addSignal (self, signal) {
-  self[kSignal] = null
-  self[kListener] = null
-
-  if (!signal) {
-    return
-  }
-
-  if (signal.aborted) {
-    abort(self)
-    return
-  }
-
-  self[kSignal] = signal
-  self[kListener] = () => {
-    abort(self)
-  }
-
-  if ('addEventListener' in self[kSignal]) {
-    self[kSignal].addEventListener('abort', self[kListener])
-  } else {
-    self[kSignal].addListener('abort', self[kListener])
-  }
-}
-
-function removeSignal (self) {
-  if (!self[kSignal]) {
-    return
-  }
-
-  if ('removeEventListener' in self[kSignal]) {
-    self[kSignal].removeEventListener('abort', self[kListener])
-  } else {
-    self[kSignal].removeListener('abort', self[kListener])
-  }
-
-  self[kSignal] = null
-  self[kListener] = null
-}
-
-module.exports = {
-  addSignal,
-  removeSignal
-}