Update parent package and version
# fmt: off
-__title__ = "spacy"
-__version__ = "3.0.0.dev14"
+__title__ = "spacy_nightly"
+__version__ = "3.0.0a0"
__release__ = True
__download_url__ = "https://github.com/explosion/spacy-models/releases/download"
__compatibility__ = "https://raw.githubusercontent.com/explosion/spacy-models/master/compatibility.json"
