[mbed-tls] Mbed TLS: long term support versions

Dear all, I wish to know which are the future LTS (Long Term Support) versions for Mbed TLS. In these last years I have been working with the 2.16.x, but I read it will be maintained until at least the end of 2021 ( https://github.com/ARMmbed/mbedtls/blob/development/BRANCHES.md#current-bran... https://github.com/ARMmbed/mbedtls/blob/development/BRANCHES.md#current-branches ), so I am considering an update to a newer LTS version. However I don’t find which are the next LTS version and for how much time they will be maintained. Thanks in advance. Regards, Matteo