Please include CVE-2021-26911 fix in an "official" release/tag

[WhyWake]

Hello,
First off, thanks for working on the mailcore2 library, and making it available for everyone to use!

I see mailcore2 previously had vulnerability CVE-2021-26911, which has since been fixed: #1903. However, this is not yet part of any official release from mailcore2. The latest release 0.6.4 was before this fix, so doesn't contain it.

Could you please push out a release that does contain this fix?

We can of course download the current code from master, but this is non-ideal from a version-tracking point of view. i.e., master changes with time, and we cannot authoritatively know which version of the library we are using.

Thanks
-Vivek