Update README.md

README.md

@@ -38,6 +38,7 @@ To Do List:
 * Add tests
 * Map is currently outputting as Array<Map> due to how Protobuf handles [maps](https://protobuf.com/docs/descriptors#map-fields) (as repeated entries). Need to fix.
 * Need to decide on how to truly differentiate between optional and required fields (technically all fields are optional on Protobuf, but maybe we should use the actual `optional` keyword and only have those be optional in Avro?)
+* Split up `main.go` - it's trying to do too much
 
 ---