Convert documentation to ordered list
Convert documentation to ordered list

Switch the dependency management documentation
to an ordered list from a pseudo-ordered list. This
has the benefit of using more structured markdown,
and the added benefit of matching the "Suppose"
list items with corresponding "Composer" list items.
localheinz/composer,till/composer,staabm/composer,gencer/composer,alcohol/composer,johnstevenson/composer,JBleijenberg/composer,erasys/composer,fabpot/composer,stof/composer,floverdevel/composer,composer/composer,dzuelke/composer,naderman/composer,pierredup/composer,yaman-jain/composer,nicolas-grekas/composer,balbuf/composer,MoT3rror/composer,milleruk/composer,curry684/composer,davidolrik/composer,stefangr/composer,vdm-io/composer,Soullivaneuh/composer,andrerom/composer,slbmeh/composer,hirak/composer,phansys/composer,fabiang/composer,jreinke/composer,remicollet/composer,SpacePossum/composer