Merge pull request #22 from Sorunome/master

remove everything after semicolumn in mime-type

Author: kfatehi

src/base.js

@@ -854,7 +854,7 @@ class Base {
         return download.getBufferAndType(avatarUrl).then(({buffer, type})=> {
           let opts = {
             name: path.basename(avatarUrl),
-            type,
+            type.split(';')[0],
             rawResponse: false
           };
           return client.uploadContent(buffer, opts);