py-asn1: updated to 0.4.7

Revision 0.4.7:

- Added `isInconsistent` property to all constructed types. This property
  conceptually replaces `verifySizeSpec` method to serve a more general
  purpose e.g. ensuring all required fields are in a good shape. By default
  this check invokes subtype constraints verification and is run by codecs
  on value de/serialisation.
- Deprecate `subtypeSpec` attributes and keyword argument. It is now
  recommended to pass `ValueSizeConstraint`, as well as all other constraints,
  to `subtypeSpec`.
- Fixed a design bug in a way of how the items assigned to constructed
  types are verified. Now if `Asn1Type`-based object is assigned, its
  compatibility is verified based on having all tags and constraint
  objects as the type in field definition. When a bare Python value is
  assigned, then field type object is cloned and initialized with the
  bare value (constraints verificaton would run at this moment).
- Added `WithComponentsConstraint` along with related
  `ComponentPresentConstraint` and `ComponentAbsentConstraint` classes
  to be used with `Sequence`/`Set` types representing
  `SET ... WITH COMPONENTS ...` like ASN.1 constructs.

(adam)