Remove es6-promise (#60)

Author: mmktomato

README.md

@@ -16,11 +16,8 @@ Append your "API Key" or "OAuth2 Access Token" to requests to the API to return
 ``` javascript
 import 'isomorphic-form-data';
 import 'isomorphic-fetch';
-import * as es6promise from 'es6-promise';
 import * as backlogjs from 'backlog-js';
 
-es6promise.polyfill();
-
 // 'xxx.backlog.jp' or 'xxx.backlogtool.com' or 'your package host'
 const host = 'yourSpaceHost';
 const apiKey = 'yourApiKey';

package-lock.json

@@ -38,7 +38,6 @@
     "browserify": "^17.0.0",
     "coveralls": "^3.1.1",
     "dotenv": "^16.0.0",
-    "es6-promise": "^4.2.8",
     "espower-typescript": "^10.0.0",
     "isomorphic-fetch": "^3.0.0",
     "isomorphic-form-data": "^2.0.0",

package.json

@@ -9,7 +9,6 @@ import * as Fixtures from './fixtures/index';
 import 'isomorphic-form-data';
 import 'isomorphic-fetch';
 
-require('es6-promise').polyfill();
 dotenv.config();
 
 const host = process.env.BACKLOG_HOST || 'example.backlog.jp';