Use is-promise

Author: lukechilds

package.json

@@ -27,6 +27,7 @@
     "inherits": "2.0.3",
     "is-arguments": "^1.0.4",
     "is-generator-function": "^1.0.7",
+    "is-promise": "^2.1.0",
     "object.entries": "^1.1.0"
   },
   "license": "MIT",

support/types.js

@@ -5,6 +5,7 @@
 
 var isArgumentsObject = require('is-arguments');
 var isGeneratorFunction = require('is-generator-function');
+var isPromise = require('is-promise');
 
 function uncurryThis(f) {
   return f.call.bind(f);
@@ -56,6 +57,8 @@ exports.isArgumentsObject = isArgumentsObject;
 
 exports.isGeneratorFunction = isGeneratorFunction;
 
+exports.isPromise = isPromise;
+
 function isArrayBufferView(value) {
   return ArrayBufferSupported && ArrayBuffer.isView(value);
 }
@@ -169,11 +172,6 @@ function isBigUint64Array(value) {
 }
 exports.isBigUint64Array = isBigUint64Array;
 
-function isPromise(value) {
-  return ObjectToString(value) === '[object Promise]';
-}
-exports.isPromise = isPromise;
-
 function isMap(value) {
   return ObjectToString(value) === '[object Map]';
 }