Read the Docs, System requirements, Ubuntu, no package sqlite-dev

[stoneyv]

I spent a bit of time trying to figure out how the Read the Docs are generated so that I could make a PR.
The system requirements for Ubuntu list a package that does not exist. sqlite-dev does not exist.
I used this command to search for possible packages.
apt-cache search sqlite

This might be the correct package
sudo apt install libsqlite3-dev

[brennv]

Thanks @stoneyv Fix with: eeb751d in #28

[iandennismiller]

@stoneyv @brennv thank you both - this change is now in the develop branch.