Fix asyncDelegator reporting done too early (#187)

See: microsoft/TypeScript#45400

Author: apendua

tslib.es6.js

@@ -195,7 +195,7 @@ export function __asyncGenerator(thisArg, _arguments, generator) {
 export function __asyncDelegator(o) {
     var i, p;
     return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i;
-    function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === "return" } : f ? f(v) : v; } : f; }
+    function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }
 }
 
 export function __asyncValues(o) {

tslib.js

@@ -237,7 +237,7 @@ var __createBinding;
     __asyncDelegator = function (o) {
         var i, p;
         return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i;
-        function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === "return" } : f ? f(v) : v; } : f; }
+        function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }
     };
 
     __asyncValues = function (o) {