Announce Event Espresso 3 removal

[remcotolsma]

See https://github.com/pronamic/wp-pronamic-pay/issues/293#issuecomment-1008784776 for https://www.pronamic.eu/pronamic-pay-support-for-event-espresso-3-removed/.

• [x] Improve post on Pronamic.eu.
• [x] Add post on Pronamic.nl.
• [x] Check recent support tickets.
• [x] Post messages on social media.
• [x] Deprecate on https://www.wp-pay.org/extensions/.
• [x] Remove from pronamic.nl/eu (update blogs, remove manuals).

[remcotolsma]

For on Twitter?

Are you still using Event Epsresso 3 in combination with Pronamic Pay? We are removing support for Event Espresso 3, so please switch to Event Espresso 4 as soon as possible. For more information, see: https://www.pronamic.eu/pronamic-pay-support-for-s2member-removed/.

[remcotolsma]

Check recent support tickets.

We have in total 29 conversations related to Event Espresso:

Year	Number
2021	1
2020	2

https://secure.helpscout.net/search/?query=tag%3Aevent-espresso

It's a mix of Event Espresso 3 and 4 tickets.

[remcotolsma]

Post messages on social media.

https://twitter.com/pronamic/status/1481229497336745987

Add post on Pronamic.nl.

• https://github.com/pronamic/wp-pronamic-pay/issues/298