Bump plexus-containers.version from 2.1.0 to 2.1.1

Bumps `plexus-containers.version` from 2.1.0 to 2.1.1.

Updates `plexus-component-annotations` from 2.1.0 to 2.1.1
- [Release notes](https://github.com/codehaus-plexus/plexus-containers/releases)
- [Changelog](https://github.com/codehaus-plexus/plexus-containers/blob/master/ReleaseNotes.md)
- [Commits](codehaus-plexus/plexus-containers@plexus-containers-2.1.0...plexus-containers-2.1.1)

Updates `plexus-container-default` from 2.1.0 to 2.1.1
- [Release notes](https://github.com/codehaus-plexus/plexus-containers/releases)
- [Changelog](https://github.com/codehaus-plexus/plexus-containers/blob/master/ReleaseNotes.md)
- [Commits](codehaus-plexus/plexus-containers@plexus-containers-2.1.0...plexus-containers-2.1.1)

Updates `plexus-component-metadata` from 2.1.0 to 2.1.1
- [Release notes](https://github.com/codehaus-plexus/plexus-containers/releases)
- [Changelog](https://github.com/codehaus-plexus/plexus-containers/blob/master/ReleaseNotes.md)
- [Commits](codehaus-plexus/plexus-containers@plexus-containers-2.1.0...plexus-containers-2.1.1)

---
updated-dependencies:
- dependency-name: org.codehaus.plexus:plexus-component-annotations
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.codehaus.plexus:plexus-container-default
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.codehaus.plexus:plexus-component-metadata
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -56,7 +56,7 @@
     <license-maven-plugin.version>1.20</license-maven-plugin.version>
     <maven.version>3.5.4</maven.version>
     <mockk.version>1.9.3</mockk.version>
-    <plexus-containers.version>2.1.0</plexus-containers.version>
+    <plexus-containers.version>2.1.1</plexus-containers.version>
   </properties>
 
   <dependencyManagement>