pombast: allow bigvolumeviewer to use of Unsafe

It has a hack in its own POM to configure the maven-compiler-plugin
to run in a mode that allows use of sun.misc.Unsafe. But pombast's
execution does not honor the hack. Fortunately, setting
maven.compiler.release to empty disables the plugin's passing of
the --release flag, which is what triggers the use of ct.sym, the
sealed API catalog for Java 8's public API.

Author: ctrueden

pombast.toml

@@ -991,6 +991,10 @@ ci-build = "build-main"
 [components."sc.fiji:bigdataviewer_fiji"]
 ci-build = "build-main"
 
+[components."sc.fiji:bigvolumeviewer"]
+# NOTE: Using the release flag disallows access to sun.misc.Unsafe.
+properties = { "maven.compiler.release" = "" }
+
 [components."sc.fiji:bij"]
 ci-build = "build-main"
 last-vetted = "20230309000000"