Jakarta JSON Processing 2.1

This release contains following changes:

• added API to create JsonValue from primitive types
• added API to create get JsonValue from java.lang.Number type
• added API to get current event from the JsonParser
• added standard property to handle duplicated keys
• clarified behaviour of JsonObjectBuilder.build() method
• clarified behaviour of JsonGenerator.close() method
• changed type bounds of a Map argument in Json.createObjectBuilder(Map): JsonObjectBuilder method
• added definition of exceptions thrown by JsonParser.getValue()/getObject()/getArray() methods
• removed (default) implementation from the specification API artifact and moved the implementation to the separate project
• provided standalone, Apache Maven based TCK 

Requires Java SE 11 or newer (aligned with Jakarta EE 10).