Bump resolverVersion from 1.9.18 to 1.9.20

Bumps `resolverVersion` from 1.9.18 to 1.9.20.

Updates `org.apache.maven.resolver:maven-resolver-api` from 1.9.18 to 1.9.20
- [Release notes](https://github.com/apache/maven-resolver/releases)
- [Commits](apache/maven-resolver@maven-resolver-1.9.18...maven-resolver-1.9.20)

Updates `org.apache.maven.resolver:maven-resolver-util` from 1.9.18 to 1.9.20
- [Release notes](https://github.com/apache/maven-resolver/releases)
- [Commits](apache/maven-resolver@maven-resolver-1.9.18...maven-resolver-1.9.20)

Updates `org.apache.maven.resolver:maven-resolver-impl` from 1.9.18 to 1.9.20
- [Release notes](https://github.com/apache/maven-resolver/releases)
- [Commits](apache/maven-resolver@maven-resolver-1.9.18...maven-resolver-1.9.20)

---
updated-dependencies:
- dependency-name: org.apache.maven.resolver:maven-resolver-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.maven.resolver:maven-resolver-util
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.maven.resolver:maven-resolver-impl
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -74,7 +74,7 @@
     <javaVersion>8</javaVersion>
     <mavenVersion>3.9.6</mavenVersion>
     <!-- Maven bound -->
-    <resolverVersion>1.9.18</resolverVersion>
+    <resolverVersion>1.9.20</resolverVersion>
     <!-- Maven bound -->
     <slf4jVersion>1.7.36</slf4jVersion>