lz4-java v1.9.0

• Replace ant-based build with maven (@yawkat)
• Use multi-platform GitHub actions for native library build (@yawkat)
• Update lz4 to v1.10.0 (@yawkat)
• Improve Java implementation bounds checking and tests (@yawkat and @Marcono1234)

Unsafe implementations should be secure now, but are not yet enabled by default.

Full Changelog: v1.8.1...v1.9.0