General changes:

• Dropped support for python 3.5 and below, including 2.7
• ruamel.yaml is now the default and preffered yaml parser
• Dropped support for pyyaml parser
• Update minimum version of ruamel.yaml to 0.16.0
• Update minimum version of python-dateutil to 2.8.0

CLI changes:

• Added new cli argument "--encoding ENCODING" that specifies what encoding to open data and schema files with

Changed behaviour:

• Enum error strings now output all possible values for easier debugging
• Removed deprecated imp module. Dynamic imports imght be affected

New features:

• Implement new type email that uses a relative simple regex to validate email addresses according to RFC 5322 Official Standard
• Implement new type url that uses a relative simple regex to validate url:s according to RFC 1808
• Add new argument "schema_file_obj" to Core class. Allows to pass in StringIO or similar interfaced objects to use for validation.
• Add new argument "data_file_obj" to Core class. Allows to pass in StringIO or similar interfaced objects to use for validation.

Bug/issues fixed:

• Fixed a regression from 1.6.1 where ruamel.yaml safe_load would break for all built-in custom python tags.
  All normal python tags should now be possible to use again.
• Fixed an issue with regex values that was not converted to str() before regex mapping was attempted.
  This should validate things like integers and objects that support str() conversion better.