Update to membrane_core v1.2

[varsill]

Hello @JasonTrue !

This PR:

• adjusts the Membrane.S3.Sink element to API provided by membrane_core v1.2
• updates dependencies of the package
• makes ex_doc only :dev dependency, with runtime: false
• makes Membrane.S3.Sink use pads with :auto flow control
• adjusts the tests accordingly

As far as I can see it has been quite a while since the last activity in this repository - if you feel like you don't have capabilities or desire to maintain this repository, Membrane team we will be happy to have it transfered to github.com/membraneframework organization and maintain it ;)
We will surely be happy to contribute more to the repository as well, as we plan to use S3 with a forthcoming tutorial.

[JasonTrue]

Thank you for the patch. The project I originally built this plugin for was canceled, so I haven't had the luxury of keeping up with the Membrane SDK updates.

I am away from my laptop tonight but I'll try to finish reviewing the PR sometime in the next 24 hours.

I am amenable to the option of moving the repo to the core membrane framework. I'd planned to add a S3 source as well but didn't have time. Let me know what documents are required to facilitate a transfer.

[varsill]

Hello @JasonTrue ! Thanks for a quick response.
Sure, take your time when it comes to reviewing the PR, we are not in a hurry ;)

I'd planned to add a S3 source as well but didn't have time.

Actually we have a kind of a POC of S3 sink, capable of reading particular byte ranges of an object. It requires some further development but it would be a good starting point.

Let me know what documents are required to facilitate a transfer.

AFAIK it would be sufficient to transfer the ownership to the https://github.com/membraneframework/ organization