version 2.0 with stability=dev

[lowtower]

Hello,

in the README is said, that washingmachine is being installed with

test:
  before_script:
   - cd /root && composer create-project thecodingmachine/washingmachine washingmachine ^2.0

That doesn't work today because one has to set stability to dev

test:
  before_script:
   - cd /root && composer create-project --stability=dev thecodingmachine/washingmachine washingmachine ^2.0

This results in the request to either publish version 2.0 as stable or change the README.