Missing support for relative imports over direct ancestor

[mmv]

✔ Works:

import pasta
tree = pasta.parse('from .uncle.package import foo')

✔ Works:

import pasta
tree = pasta.parse('from ..granduncle.package import foo')

❌ Fails:

import pasta
tree = pasta.parse('from ...greatgranduncle.package import foo')

with error AnnotationError: Expected '.' but found '...'

[soupytwist]

Seems to affect python3 only, my guess is that the py2 tokenizer splits the level into three separate . tokens but py3 combines them into one.

Thanks for reporting! Will have a fix soon.