For: `nvm install 8.12.0` after install:
--alias=8 is equivalent to `nvm alias 8 8.12.0`
--default is equivalent to `nvm alias default 8.12.0`
Co-authored-by: Kayla Altepeter <kayla@kaylaaltepeter.com>
Co-authored-by: Dena Burd <me@Denas-MacBook-Air.local>
Co-authored-by: Jordan Harband <ljharb@gmail.com>