Update antlr.version to v4.11.1

Author: renovate[bot]

pom.xml

@@ -12,7 +12,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <antlr.version>4.9.2</antlr.version>
+        <antlr.version>4.11.1</antlr.version>
     </properties>
 
     <dependencies>