Python2 likely no longer needed

[amedeedaboville]

Description

The README mentions that python2 is required because of the better-sqlite3 package.
It itself requires python2 because it depends on node-gyp, but recent versions of node-gyp support python3 and don't require python2.

The user may need to do
npm i -g node-gyp@latest
(see WiseLibs/better-sqlite3#345)
And we may need to update better-sqlite3 to version 6.0.1.
(WiseLibs/better-sqlite3#310 (comment))

Reading the commit log (they don't seem to have a changelog?) It doesn't look like anything has broken between better-sqlite3 version 5.4.0 as is currently in package.json vs 6.0.1.
I will run the tests with 6.0.1, and maybe will try installing this in a docker?

Expected result

Python2 should no longer be required to install rc-coffee-chats.

Actual result

Python2 is still required to to install rc-coffee-chats