Timeout when uploading .zip file with new plugin

I can not upload a new version of "moosh" package - the process most likely times out when moosh.zip is uploaded. This may likely be due to the fact that there is a lot of files there (in vendor directory) and unzipping may be taking a lot of time.

 Every time I try to upload I get the page with: 

Something seems to be wrong with the Internet.

It works when I limit (delete) number of files from inside the zip file.