D2639: thirdparty: start vendoring cbor python library

[pulkit (Pulkit Goyal)]

pulkit added a comment.


  The library imported in this patch has known bugs and can result in segfaults when given nested structures. Also this library is unmaintained and does not supports sets. Therefore, we import a better maintained library which handles all the cases pretty well. This is superseded by https://phab.mercurial-scm.org/D2750.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2639

To: pulkit, #hg-reviewers
Cc: mercurial-devel