Bump antlrVersion from 4.13.1 to 4.13.2 (#617)

Bumps `antlrVersion` from 4.13.1 to 4.13.2.

Updates `org.antlr:antlr4` from 4.13.1 to 4.13.2
- [Release notes](https://github.com/antlr/antlr4/releases)
- [Changelog](https://github.com/antlr/antlr4/blob/dev/CHANGES.txt)
- [Commits](antlr/antlr4@4.13.1...4.13.2)

Updates `org.antlr:antlr4-runtime` from 4.13.1 to 4.13.2
- [Release notes](https://github.com/antlr/antlr4/releases)
- [Changelog](https://github.com/antlr/antlr4/blob/dev/CHANGES.txt)
- [Commits](antlr/antlr4@4.13.1...4.13.2)

---
updated-dependencies:
- dependency-name: org.antlr:antlr4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.antlr:antlr4-runtime
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

grammars/build.gradle

@@ -1,7 +1,7 @@
 description = "grammars for parsing ADL, ODIN and xpath"
 apply plugin: 'antlr'
 
-ext.antlrVersion = '4.13.1'
+ext.antlrVersion = '4.13.2'
 
 generateGrammarSource { //antlr4
   outputDirectory = new File("${project.buildDir}/generated-src/antlr/main/com/nedap/archie/adlparser/antlr".toString())