Install docs may need updating

I followed the installation steps using composer. I was having problems and noticed it looks like composer is requiring Elgg version 3.x. However, if I try downloading Elgg instead of using composer I see version 2.3.7 is listed as stable with 3.x listed as BETA.

Should this step in the installation steps be changed so dev-master isn't cloned but maybe something else?

composer create-project elgg/starter-project:dev-master .


/I'm new to composer/php, I come from the Enterprise Java world so I could be totally offbase