fix: replace node built-in "util" module with "util-deprecate" (postcss#210)

Author: nolanlawson

package-lock.json

@@ -41,7 +41,8 @@
   "dependencies": {
     "cssesc": "^3.0.0",
     "indexes-of": "^1.0.1",
-    "uniq": "^1.0.1"
+    "uniq": "^1.0.1",
+    "util-deprecate": "^1.0.2"
   },
   "license": "MIT",
   "engines": {

package.json

@@ -3,7 +3,7 @@ import unesc from "../util/unesc";
 import Namespace from './namespace';
 import {ATTRIBUTE} from './types';
 
-const {deprecate} = require("util");
+const deprecate = require("util-deprecate");
 
 const WRAPPED_IN_QUOTES = /^('|")(.*)\1$/;