π Don't double-format errors. fixes #240 (#247) [Leif Ryge]
π Fix "Unknown format code" in Python 3.8 (#245) [Denis Blanchette]
JSON Schema: Allow using $ref when schema is not a dict (#244) [Denis Blanchette]
JSON Schema: Set additionalProperties true when dict contains str as key (#243) [Denis Blanchette]
π JSON Schema: Support schemas where the root is not a dict. [Stavros Korokithakis]
Do not drop previous errors within an Or criterion. [Stavros Korokithakis]