Make constructor protected.

Author: mattbertolini

spring-annotated-data-binder-core/src/main/java/com/mattbertolini/spring/web/bind/AbstractPropertyResolverRegistry.java

@@ -33,7 +33,7 @@
 public abstract class AbstractPropertyResolverRegistry<T extends RequestPropertyResolverBase<?, ?>> {
     private final Set<T> propertyResolvers;
 
-    public AbstractPropertyResolverRegistry() {
+    protected AbstractPropertyResolverRegistry() {
         propertyResolvers = new LinkedHashSet<>();
     }