Upgraded API compatibility level to 5.3

Author: ok2c

pom.xml

@@ -80,7 +80,7 @@
     <log4j.version>2.23.1</log4j.version>
     <rxjava.version>2.2.21</rxjava.version>
     <rxjava3.version>3.1.9</rxjava3.version>
-    <api.comparison.version>5.2</api.comparison.version>
+    <api.comparison.version>5.3</api.comparison.version>
     <hc.animal-sniffer.signature.ignores>javax.net.ssl.SSLEngine,javax.net.ssl.SSLParameters,java.nio.ByteBuffer,java.nio.CharBuffer</hc.animal-sniffer.signature.ignores>
   </properties>