v1.3.1

What's Changed

• 🐛 set mappings_provided to list type so object is picklable by @davidhopkinson26 in #258
• created BaseNumericTransformer class, setup and fixed tests by @limlam96 in #266
• Bring GroupRareLevelsTransformer in line with new testing setup by @davidhopkinson26 in #259
• bring NominalToIntegerTransformer in line with new testing setup by @davidhopkinson26 in #261
• Feature/ohe refactor by @Chip2916 in #267
• reworked log transformer tests by @limlam96 in #268
• Update CONTRIBUTING.rst by @davidhopkinson26 in #270

Full Changelog: v1.3.0...v1.3.1