switch to native promises

Signed-off-by: Chris West (Faux) <git@goeswhere.com>

lib/index.js

@@ -2,8 +2,7 @@
 
 "use strict";
 
-var Promise = require("bluebird");
-var fs = Promise.promisifyAll(require("fs"));
+const fs = require("fs");
 var xml2js = require("xml2js");
 var traverse = require('traverse');
 
@@ -33,26 +32,23 @@ module.exports.parse = function(opt, callback) {
   // If the xml content is was not provided by the api client.
   // https://github.com/petkaantonov/bluebird/blob/master/API.md#error-rejectedhandler----promise
   if (!opt.xmlContent) {
-    fs.readFileAsync(opt.filePath, "utf8").then(function(xmlContent) {
+    readFileAsync(opt.filePath, "utf8").then(function(xmlContent) {
       return xmlContent;
 
     }).then(_parseWithXml2js).then(function(result) {
       callback(null, result);
 
     }).catch(function(e) {
       callback(e, null);
-
-    }).error(function (e) {
-      callback(e, null);
     });
 
   } else {
     // parse the xml provided by the api client.
     _parseWithXml2js(opt.xmlContent).then(function(result) {
-      delete result.xmlContent;  
+      delete result.xmlContent;
       callback(null, result);
 
-    }).error(function (e) {
+    }).catch(function (e) {
       callback(e);
     });
   }
@@ -99,3 +95,13 @@ function removeSingleArrays(obj) {
     }
   });
 }
+
+function readFileAsync(path, encoding) {
+  return new Promise((resolve, reject) => fs.readFile(path, {encoding}, (err, data) => {
+    if (err) {
+      reject(err);
+    } else {
+      resolve(data);
+    }
+  }));
+}

package.json

@@ -14,7 +14,6 @@
     "coverage": "nyc report --reporter=text-lcov | coveralls"
   },
   "dependencies": {
-    "bluebird": "^2.9.34",
     "traverse": "^0.6.6",
     "xml2js": "^0.4.9"
   },