fix ut error：png can't be parsed review by zhurc

yuiung · yuiung · commit 2aa2dc7accda · 2017-08-10T17:02:17.000+08:00
diff --git a/package.json b/package.json
@@ -51,6 +51,7 @@
     "browserify": "^14.3.0",
     "browserify-css": "^0.11.1",
     "browserify-istanbul": "^2.0.0",
+    "browserify-imgify": "^0.0.1",
     "chromedriver": "^2.29.2",
     "clean-css-cli": "^4.1.6",
     "commander": "^2.9.0",
diff --git a/test/karma.conf.js b/test/karma.conf.js
@@ -22,6 +22,7 @@ module.exports = function (config) {
                     plugins: ['transform-class-properties']
                 }],
                 require('browserify-css'),
+                require('browserify-imgify'),
                 [require('browserify-istanbul'), {
                     instrumenterConfig: {
                         embedSource: true
