Set version to v2.1.3

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Merge pull request explosion#3434 from Bharat123rox/narrow-unicode

Raise Error for a narrow unicode build of Python

Set version to 2.1.0

Set version to v2.1.0a13

Update push-tag script

Set version to v2.1.0a11

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

…elop

Set version to v2.1.0a8