[Fix] avoid crashing with --disable-proto=throw

Fixes #26.

.github/workflows/node-noproto.yml

@@ -0,0 +1,18 @@
+name: 'Tests: node --disable-proto=throw'
+
+on: [pull_request, push]
+
+jobs:
+  tests:
+    uses: ljharb/actions/.github/workflows/node.yml@main
+    with:
+      range: '>= 12.17'
+      type: minors
+      command: 'NODE_OPTIONS="--disable-proto=throw" npx tape "test/**/*.js"'
+
+  node:
+    name: 'node --disable-proto=throw'
+    needs: [tests]
+    runs-on: ubuntu-latest
+    steps:
+      - run: 'echo tests completed'

implementation.js

@@ -4,10 +4,12 @@ var forEach = require('for-each');
 
 var isES5 = typeof Object.defineProperty === 'function';
 
-var hasProto = require('has-proto')();
+var gPO = Object.getPrototypeOf;
+var sPO = Object.setPrototypeOf;
+var hasProto = require('has-proto')() || (typeof gPO === 'function' && gPO([]) === Array.prototype);
 
 if (!isES5 || !hasProto) {
-	throw new TypeError('util.promisify requires a true ES5 environment, that also supports `__proto__`');
+	throw new TypeError('util.promisify requires a true ES5+ environment, that also supports `__proto__` and/or `Object.getPrototypeOf`');
 }
 
 var getOwnPropertyDescriptors = require('object.getownpropertydescriptors');
@@ -85,7 +87,11 @@ module.exports = function promisify(orig) {
 		});
 	};
 
-	promisified.__proto__ = orig.__proto__; // eslint-disable-line no-proto
+	if (typeof sPO === 'function' && typeof gPO === 'function') {
+		sPO(promisified, gPO(orig));
+	} else {
+		promisified.__proto__ = orig.__proto__; // eslint-disable-line no-proto
+	}
 
 	oDP(promisified, kCustomPromisifiedSymbol, {
 		configurable: true,