[infrastructure] move infered nullness warnings to error and update EEA (#8949)

Signed-off-by: Jan N. Klug <jan.n.klug@rub.de>

bundles/org.openhab.binding.elerotransmitterstick/src/main/java/org/openhab/binding/elerotransmitterstick/internal/stick/TransmitterStick.java

@@ -159,7 +159,7 @@ public class TransmitterStick {
         private static final long serialVersionUID = -3216360253151368826L;
 
         public DueCommandSet() {
-            super(new Comparator<Command>() {
+            super(new Comparator<>() {
                 /**
                  * Due commands are sorted by priority first and then by delay.
                  */