but these conflict with your requirements or minimum-stability

Question

I am creating my own slackbot. I decided to use project as a library to help me.

https://github.com/sagebind/slack-client/issues?utf8=%E2%9C%93&q=stability

Answer 1

You should add the minimum-stability in your composer.json not in the composer.lock. The option exists see https://getcomposer.org/doc/04-schema.md#minimum-stability