fix typeMap to use Hash192

Author: nkramer44

xrpl4j-core/src/main/java/org/xrpl/xrpl4j/codec/binary/types/SerializedType.java

@@ -49,7 +49,7 @@ public abstract class SerializedType<T extends SerializedType<T>> {
       .put("Currency", () -> new CurrencyType())
       .put("Hash128", () -> new Hash128Type())
       .put("Hash160", () -> new Hash160Type())
-      .put("UInt192", () -> new UInt192Type())
+      .put("Hash192", () -> new UInt192Type())
       .put("Hash256", () -> new Hash256Type())
       .put("PathSet", () -> new PathSetType())
       .put("STArray", () -> new STArrayType())
@@ -76,7 +76,11 @@ public SerializedType(UnsignedByteArray bytes) {
    * @return A {@link SerializedType} for the supplied {@code name}.
    */
   public static SerializedType<?> getTypeByName(String name) {
-    return typeMap.get(name).get();
+    try {
+      return typeMap.get(name).get();
+    } catch (NullPointerException e) {
+      throw e;
+    }
   }
 
   /**