CI: update minimum tested Java from 8 to 11

Unfortunately, OpenJDK 8 tests are crashing on CI on (at least)
macOS and Ubuntu. Let's see if OpenJDK 11 does any better.

Author: ctrueden

bin/test.sh

@@ -36,13 +36,10 @@ do
   test "$mode" || continue
   msg="${mode%|*}|"
   flag=${mode##*|}
-  for java in 8 21
+  for java in 11 21
   do
-    # HACK: Skip crashing macOS tests on CI.
-    test "$RUNNER_OS" = macOS -a "$java" -eq 8 && continue
-
-    # Fiji-Latest requires Java 21; skip Fiji-Latest + Java 8.
-    echo "$msg" | grep -q Fiji-Latest && test "$java" -eq 8 && continue
+    # Fiji-Latest requires Java 21; skip Fiji-Latest with older Javas.
+    echo "$msg" | grep -q Fiji-Latest && test "$java" -lt 21 && continue
 
     echo "-------------------------------------"
     echo "$msg"