Release Cypht 2.1

[marclaporte]

Please release Cypht 2.1.0
It should include PHPUnit 10 and thus require PHP 8.1+
It will be our first version for our new Docker setup

Please make sure it includes #1044, #1043 and whatever else is ready at https://github.com/cypht-org/cypht/pulls

[jonocodes]

The first docker release already happened. Version 2.0.1:
#1047 (comment)

And if version 2.1 is using PHP 8, we will need to update and test the Dockerfile before releasing. Once the PHPUnit 10 code is merged, I can update the Dockerfile.

[marclaporte]

@josaphatim @Shadow243 @Yannick243 please also address any severe issues from https://github.com/cypht-org/cypht/wiki/Test-IMAP-SMTP-&-JMAP-SMTP-with-Stalwart

[marclaporte]

79 commits so far:
v2.0.1...master

Let's get all these enhancements packaged :-)

[Shadow243]

79 commits so far:

v2.0.1...master

Let's get all these enhancements packaged :-)

Copy that

[marclaporte]

https://github.com/cypht-org/cypht/releases/tag/v2.1.0

[marclaporte]

Related: cypht-org/cypht-website#64