fixes #857

In previous work, I added in a bunch of arbitrary timeouts, this was because I wanted requests to fail faster if there was an issue. This however was misguided because the actual solution was cancelling the requests. The timeouts were also copied over from our webhook delivery service that I worked on and themekit and that service have vastly different request requirements. Webhook delivery requires fast completion on delivery, however themekit is used to uploading very large files that need more time to complete, so this was done in error.

I have just removed all of these timeouts as the defaults are either pretty large or no timeout is set at all. There is still a general overall request timeout so that does not mean requests will get stuck.

This fix has been confirmed in the issue linked

Warn Checklist

• This changes the interface and requires a Major/Minor version change.
• I have 🎩'd these changes by using the commands I changed by hand.
• I have added a dependancy to the project.
• I have considered any potential impact on node-themekit