And then upload it to the created release.
One less step during the release process 💪
We are using that GitHub Actions: https://github.com/shogo82148/actions-upload-release-asset
I've also:
- updated the release script to clone the repo using `https` instead of `git` (otherwise it failed during the build)
- use `md5sum` instead of `md5` because the latest isn't available in GitHub Actions
We initially ignored the `composer.lock` because it generated a lock of rebase on PR when someone updated it and the master updated it too.
Now we have less contributions (sadly) so I think we won't run against that problem.
Also, it'll solve issue about people cloning the master and got angry because composer eat all the available memory to determine packages to install.
It'll also be much easier to make release.
Scrutinizer & Travis will be faster too.
