Revert eslintrc change, return Promise instead of using async/await

.eslintrc.js

@@ -5,9 +5,6 @@ module.exports = {
         "es6": true,
         "node": true
 	},
-	"parserOptions": {
-		"ecmaVersion": 2017,
-	},
     "extends": "eslint:recommended",
     "rules": {
         "accessor-pairs": "error",

ospec/tests/test-ospec.js

@@ -200,8 +200,8 @@ o.spec("ospec", function() {
 			})
 		})
 
-		o("promise functions", async function() {
-			await wrapPromise(function() {
+		o("promise functions", function() {
+			return wrapPromise(function() {
 				o(a).equals(b)
 				o(a).equals(1)("a and b should be initialized")
 			})