fix: Add missing meridiems (am/pm) for languages, including french and spanish

[JackHowa]

• Recreating #332 and hoping this is still of interest @bigeasy -- if you have time

Test steps locally:

using node@12

1. git clone https://github.com/bigeasy/timezone.git
2. git submodule update --init --recursive
3. make
4. npm i
5. npm t

Closes https://github.com/bigeasy/timezone/issues/331

If a user is expecting to not get a meridiem because the locale previously didn't support it, then they would not get it if they elected for that format