Replace fs with fs/promises and glob with glob-promise

lib/reader.js

@@ -1,9 +1,8 @@
 var Promise = require('./Promise');
 var path = require('path');
 var yaml = require('js-yaml');
-var objectAssign = require('object-assign');
-var glob = Promise.promisify(require('glob'));
-var fs = Promise.promisifyAll(require('fs'));
+var glob = require('glob-promise');
+var fs = require('fs').promises;
 var logger = require('./logger');
 
 var Reader = module.exports = function (options) {
@@ -28,7 +27,7 @@ Reader.prototype.readFile = Promise.method(function(filename) {
         if (!PARSERS[ext]) {
             throw new Error('unknown file type: ', ext);
         }
-        return fs.readFileAsync(filename, this.options.encoding).then(function(data) {
+        return fs.readFile(filename, this.options.encoding).then(function(data) {
             var fixtures = PARSERS[ext](data);
             if (fixtures.fixtures) fixtures = fixtures.fixtures;
             return fixtures;