Add a new tag (1.2.7?) for pull request #29

[sebastian]

Hello dear devs.
Thanks for the wonderful lhttpc library!
Personally I like to specify my dependencies by version, to ensure that I don't get breakage in the future.

The most recent tag (1.2.6) doesn't add Content-Length to PATCH requests. I was working on a pull request when I realized this had already been solved on master.
Would you mind tagging the latest version? For example as 1.2.7?

Appreciate it!

Thank you!