Fix code-style

Closes GH-140.

Reviewed-by: Titus Wormer <tituswormer@gmail.com>
Reviewed-by: Christian Murphy <christian.murphy.42@gmail.com>

test/freeze.js

@@ -1,7 +1,7 @@
 'use strict'
 
 var test = require('tape')
-var simple = require('./util/simple')
+var simple = require('./util/simple.js')
 var unified = require('..')
 
 test('freeze()', function (t) {

test/index.js

@@ -1,14 +1,14 @@
 'use strict'
 
 /* eslint-disable import/no-unassigned-import */
-require('./core')
-require('./freeze')
-require('./data')
-require('./use')
-require('./parse')
-require('./run')
-require('./stringify')
-require('./process')
+require('./core.js')
+require('./freeze.js')
+require('./data.js')
+require('./use.js')
+require('./parse.js')
+require('./run.js')
+require('./stringify.js')
+require('./process.js')
 
 var asyncfunctions = false
 
@@ -19,7 +19,7 @@ try {
 
 console.log('asyncfunctions:', asyncfunctions)
 if (asyncfunctions) {
-  require('./async-function')
+  require('./async-function.js')
 }
 
 /* eslint-enable import/no-unassigned-import */

test/process.js

@@ -2,8 +2,8 @@
 
 var test = require('tape')
 var vfile = require('vfile')
-var simple = require('./util/simple')
-var noop = require('./util/noop')
+var simple = require('./util/simple.js')
+var noop = require('./util/noop.js')
 var unified = require('..')
 
 test('process(file, done)', function (t) {

test/stringify.js

@@ -2,7 +2,7 @@
 
 var test = require('tape')
 var vfile = require('vfile')
-var noop = require('./util/noop')
+var noop = require('./util/noop.js')
 var unified = require('..')
 
 test('stringify(node[, file])', function (t) {