Allow annotation processing to float upwards in version support (#317)

Author: markelliot

barista-processor/src/main/java/com/markelliot/barista/processor/EndpointHandlerProcessor.java

@@ -46,7 +46,6 @@
 import javax.annotation.processing.Processor;
 import javax.annotation.processing.RoundEnvironment;
 import javax.annotation.processing.SupportedAnnotationTypes;
-import javax.annotation.processing.SupportedSourceVersion;
 import javax.lang.model.SourceVersion;
 import javax.lang.model.element.Element;
 import javax.lang.model.element.ElementKind;
@@ -63,9 +62,13 @@
     "com.markelliot.barista.annotations.Http.Put",
     "com.markelliot.barista.annotations.Http.Delete",
 })
-@SupportedSourceVersion(SourceVersion.RELEASE_17)
 public final class EndpointHandlerProcessor extends AbstractProcessor {
 
+    @Override
+    public SourceVersion getSupportedSourceVersion() {
+        return SourceVersion.latestSupported();
+    }
+
     @Override
     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
         try {