can't nest annotable objects with defaults

[cpcloud]

In [3]: from koerce import Annotable

In [4]: class Bar(Annotable):
   ...:     x: int
   ...:

In [5]: class Foo(Annotable):
   ...:     bar: Bar = Bar(1)
   ...:
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[5], line 1
----> 1 class Foo(Annotable):
      2     bar: Bar = Bar(1)

File koerce/_internal.pyx:3169, in koerce._internal.AnnotableMeta.__new__()

File koerce/_internal.pyx:2687, in koerce._internal.Parameter.__init__()

File koerce/_internal.pyx:1391, in koerce._internal.AsCoercible.match()

File koerce/_internal.pyx:3284, in koerce._internal.Annotable.__coerce__()

TypeError: __coerce__() takes exactly 2 positional arguments (1 given)

[cpcloud]

Without a default, the construction still fails:

In [6]: class Foo(Annotable):
   ...:     bar: Bar
   ...:

In [7]: Foo(Bar(1))
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[7], line 1
----> 1 Foo(Bar(1))

File koerce/_internal.pyx:3196, in koerce._internal.AnnotableMeta.__call__()

File koerce/_internal.pyx:3101, in koerce._internal.AnnotableSpec.new()

File koerce/_internal.pyx:1391, in koerce._internal.AsCoercible.match()

File koerce/_internal.pyx:3284, in koerce._internal.Annotable.__coerce__()

TypeError: __coerce__() takes exactly 2 positional arguments (1 given)

[kszucs]

Ooops, can you just delete Annotable.__coerce__? My original idea was to allow coercing dictionaries to annotable objects, but I haven't finished the implementation of that.