v3.1.0-beta.4

What's Changed

• Fix/delete invalid tests by @frk-dc in #1
• feat: Convert to typescript by @frk-dc in #3
• feat: update converted schema type, add type guards by @frk-dc in #7

Full Changelog: https://github.com/deepcrawl/jsonschema-avro/commits/v3.1.0-beta.4