Update version number

CHANGELOG.md

 # Change Log
 
-## Version ??? - Soon
+## Version 1.2.0 - 2021-04-07
 
 - Update inscription form and displayed info for 'at home' event.
 - Update metrics to remove unused info (meals, sleeps, ...)
 - Added link to discord
+- Changed models for repeated activities to a separate "slot" table (cleaner)
+- Added check for slotless activity before sending mails
+- Added HTML formatting for global message
 
 ## Version 1.1.0 - Repeated Activities - 2021-03-30
 

site_settings/constants.py

 # The website version number
-WEBSITE_VERSION = "1.1.0b"
-WEBSITE_VERSION_DATE = "2021-04-03"
+WEBSITE_VERSION = "1.2.0"
+WEBSITE_VERSION_DATE = "2021-04-07"
 
 WEBSITE_FULL_VERSION = "{} - {}".format(
 	WEBSITE_VERSION, WEBSITE_VERSION_DATE