fix(opengraph): fixed opengraph error

Author: ritz078

dist/embed.min.js

@@ -1,4 +1,4 @@
-import { ifEmbed, createText, deepExtend, cloneObject, processOptions } from './modules/utils'
+import {ifEmbed, createText, deepExtend, cloneObject, processOptions} from './modules/utils'
 
 import Renderer    from './modules/template'
 
@@ -23,7 +23,7 @@ import Github      from './modules/github'
 
 import regex from './modules/regex'
 
-import { applyVideoJS, playVideo, destroyVideos, baseEmbed } from './helpers'
+import {applyVideoJS, playVideo, destroyVideos, baseEmbed} from './helpers'
 
 var globalOptions = {};
 
@@ -66,6 +66,7 @@ var defaultOptions = {
 	videoWidth             : null,
 	videoDetails           : true,
 	audioEmbed             : true,
+	imageEmbed             : true,
 	excludeEmbed           : [],
 	inlineEmbed            : [],
 	inlineText             : true,

src/embed.es2015.js

@@ -28,17 +28,15 @@ export default class OpenGraph {
 	}
 
 	static urlToText(_, match, url) {
-		if (!url.match(_.excludeRegex)) return;
+		if (url.match(_.excludeRegex)) return Promise.resolve();
 
 		return new Promise((resolve) => {
-			OpenGraph.fetchData(url, _).then((data) => resolve(data && data.success ? _.template(data) : null))
+			OpenGraph.fetchData(url, _).then((data) => resolve(data && data.success ? _.template(data) : ''))
 		})
 	}
 
 
 	process() {
-		return new Promise(function (resolve) {
-			asyncEmbed(this, OpenGraph.urlToText).then((data) => resolve(data))
-		})
+		return new Promise((resolve) => asyncEmbed(this, OpenGraph.urlToText).then((data) => resolve(data)))
 	}
 }