Log Message:
py-asn1crypto: updated to 1.3.0

1.3.0
- Added `encrypt_key_pref` (`1.2.840.113549.1.9.16.2.11`) to
  `cms.CMSAttributeType()`, along with related structures
- Added Brainpool curves from RFC 5639 to `keys.NamedCurve()`
- Fixed `x509.Certificate().subject_directory_attributes_value`
- Fixed some incorrectly computed minimum elliptic curve primary key
  encoding sizes in `keys.NamedCurve()`
- Fixed a `TypeError` when trying to call `.untag()` or `.copy()` on a
  `core.UTCTime()` or `core.GeneralizedTime()`, or a value containing one,
  when using Python 2