v0.9.3

This version supports JDK17 #660.

Important: If you need to use DirectByteBuffer (raw memory access) in JDK17 or later, specify two JVM options to allow accessing native memory:

--add-opens=java.base/java.nio=ALL-UNNAMED
--add-opens=java.base/sun.nio.ch=ALL-UNNAMED
Internal updates:

Use SPDX-ID in license name #653
Update airframe-json, airspec to 22.6.4 #659
Update akka-actor to 2.6.19 #647