Bump antlr4-runtime from 4.9 to 4.9.1

Bumps [antlr4-runtime](https://github.com/antlr/antlr4) from 4.9 to 4.9.1.
- [Release notes](https://github.com/antlr/antlr4/releases)
- [Changelog](https://github.com/antlr/antlr4/blob/master/CHANGES.txt)
- [Commits](antlr/antlr4@4.9...4.9.1)

Signed-off-by: dependabot[bot] <support@github.com>

safeplace/pom.xml

@@ -33,7 +33,7 @@
         <dependency>
             <groupId>org.antlr</groupId>
             <artifactId>antlr4-runtime</artifactId>
-            <version>4.9</version>
+            <version>4.9.1</version>
             <scope>compile</scope>
         </dependency>
         <dependency>