Support Node.js 10

.travis.yml

@@ -3,6 +3,7 @@ language: node_js
 node_js:
   - 6
   - 8
+  - 10
 
 matrix:
   fast_finish: true

appveyor.yml

@@ -4,6 +4,7 @@ environment:
   matrix:
     - nodejs_version: 6
     - nodejs_version: 8
+    - nodejs_version: 10
 
 version: "{build}"
 build: off

test/setup.js

@@ -27,7 +27,7 @@ function compareFixtures(name, msg, opts, postcssOpts, plugin) {
               const expected = read(`fixtures/${name}.expected`);
 
             // handy thing: checkout actual in the *.actual.css file
-              fs.writeFile(`test/fixtures/${name}.actual.css`, actual);
+              fs.writeFile(`test/fixtures/${name}.actual.css`, actual, () => {});
 
               assert.equal(actual, expected);
           });