0.3.8

What's Changed

• fix protobuf broken version for google (optional) dependencies by @tylerhutcherson in #254
• migrates mistral vectorizer to new client by @justin-cechmanek in #255
• sets the default datatype in our vectorizers to float32 if not specified by users by @justin-cechmanek in #253
• Upgrade to readthedocs.org documentation by @tylerhutcherson in #256
• Release version 0.3.8 by @tylerhutcherson in #257

Full Changelog: 0.3.7...0.3.8