dependency: bump antlr4.version from 4.7.2 to 4.8-1

Bumps `antlr4.version` from 4.7.2 to 4.8-1.

Updates `antlr4-runtime` from 4.7.2 to 4.8-1
- [Release notes](https://github.com/antlr/antlr4/releases)
- [Changelog](https://github.com/antlr/antlr4/blob/master/CHANGES.txt)
- [Commits](https://github.com/antlr/antlr4/commits)

Updates `antlr4-maven-plugin` from 4.7.2 to 4.8-1
- [Release notes](https://github.com/antlr/antlr4/releases)
- [Changelog](https://github.com/antlr/antlr4/blob/master/CHANGES.txt)
- [Commits](https://github.com/antlr/antlr4/commits)

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

pom.xml

@@ -198,7 +198,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <projectVersion>${project.version}</projectVersion>
-    <antlr4.version>4.7.2</antlr4.version>
+    <antlr4.version>4.8-1</antlr4.version>
     <maven.site.plugin.version>3.8.2</maven.site.plugin.version>
     <maven.spotbugs.plugin.version>3.1.12.2</maven.spotbugs.plugin.version>
     <maven.pmd.plugin.version>3.12.0</maven.pmd.plugin.version>