feat: add signal opt (#280)

Pass opts.signal to fetch

## References
Closes #276

Author: clemgbld

lib/index.js

@@ -130,6 +130,7 @@ function regFetch (uri, /* istanbul ignore next */ opts_ = {}) {
       },
       strictSSL: opts.strictSSL,
       timeout: opts.timeout || 30 * 1000,
+      signal: opts.signal,
     }).then(res => checkResponse({
       method,
       uri,

test/index.js

@@ -450,3 +450,21 @@ t.test('miscellaneous headers not being set if not present in options', async t
   })
   t.equal(res.status, 200, 'got successful response')
 })
+
+t.test('opts.signal', async t => {
+  const controller = new AbortController()
+  const { signal } = controller
+
+  controller.abort()
+
+  try {
+    await fetch('/hello', {
+      ...OPTS,
+      signal,
+    })
+  } catch (err) {
+    t.equal(err.name, 'AbortError')
+    return true
+  }
+  t.fail('should have thrown AbortError')
+})