Merge VS Code 1.31.1 (#4283)

src/tsconfig.monaco.json

@@ -19,6 +19,7 @@
 		"./typings/require-monaco.d.ts",
 		"typings/thenable.d.ts",
 		"typings/es6-promise.d.ts",
+		"typings/lib.es2018.promise.d.ts",
 		"typings/lib.array-ext.d.ts",
 		"typings/lib.ie11_safe_es6.d.ts",
 		"vs/css.d.ts",
@@ -35,4 +36,4 @@
 	"exclude": [
 		"node_modules/*"
 	]
-}
+}