[BUG] Outdated/typo in requirements.txt

[johnygomez]

Description

It seems current requirements.txt is either outdated or contains a typo in

supersqlite/requirements.txt

Line 1 in d74da74

lsb-db>=0.6.4

When trying to pip install lsb-db==0.6.4 I get following error

Could not find a version that satisfies the requirement lsb-db==0.6.4 (from versions: none)

I guess this could be a typo for lsm-db?

Expected behavior

Installing this package via pip won't fail

System

Ubuntu 18.04LTS / Python 3.6 / pip 19.1.1

cc @AjayP13