Set version to v2.1.0a5

Merge branch 'develop' of https://github.com/explosion/spaCy into dev…

…elop

Fix batch size in parser.pipe

Merge branch 'develop' of https://github.com/explosion/spaCy into dev…

…elop

Set version to v2.0.18

Try again to fix OSX build

Set version to v2.0.18.dev0

Fix conftest getoption

Set version to 2.1.0a3.dev0

fixes symbolic link on py3 and windows (explosion#2949)

* fixes symbolic link on py3 and windows
during setup of spacy using command
python -m spacy link en_core_web_sm en
closes explosion#2948

* Update spacy/compat.py

Co-Authored-By: cicorias <cicorias@users.noreply.github.com>