Update objectify options

Author: Liang5757

README.md

@@ -121,7 +121,7 @@ postcss().process(obj, { parser: postcssJs })
 ```
 
 
-### `objectify(root, stringifyImportant): object`
+### `objectify(root): object`
 
 Convert PostCSS `Root` instance to CSS-in-JS style object.
 

objectifier.js

@@ -33,9 +33,10 @@ function atRule(node) {
   }
 }
 
-function process(node, stringifyImportant) {
+function process(node, options = {}) {
   let name
   let result = {}
+  let { stringifyImportant } = options;
 
   node.each(child => {
     if (child.type === 'atrule') {

test/objectifier.test.js

@@ -168,7 +168,7 @@ test('keeps last important in merge', () => {
 
 test('prioritizes important in merge', () => {
   let root = parse('a { height: 1px !important; };a { height: 2px }')
-  equal(postcssJS.objectify(root, true), {
+  equal(postcssJS.objectify(root, { stringifyImportant: true }), {
     a: {
       height: "1px !important"
     }
@@ -177,7 +177,7 @@ test('prioritizes important in merge', () => {
 
 test('keeps last important with priority', () => {
   let root = parse('a { height: 1px !important; };a { height: 2px !important; }')
-  equal(postcssJS.objectify(root, true), {
+  equal(postcssJS.objectify(root, { stringifyImportant: true }), {
     a: {
       height: "2px !important"
     }