Add support for promo info in subscription paid upgrade events #70
Description
Is your feature request related to a problem? Please describe.
Can't simulate these usernotices with all params.
Describe the solution you'd like
Would like to be able to trigger these usernotices with promo-related data specified.
Additional context
giftpaidupgrade - user was previously gifted a sub, is now buying their own
anongiftpaidupgrade - same as above, but was previously gifted by an anonymous user
Key params: msg-param-promo-name & msg-param-promo-gift-total & msg-param-sender-login & msg-param-sender-name
Already implemented:
primepaidupgrade - user previously had a prime sub, now has a tiered one
Key param: msg-param-sub-plan