Bump org.codehaus.mojo:mojo-parent from 80 to 84

Bumps [org.codehaus.mojo:mojo-parent](https://github.com/mojohaus/mojo-parent) from 80 to 84.
- [Release notes](https://github.com/mojohaus/mojo-parent/releases)
- [Commits](https://github.com/mojohaus/mojo-parent/commits)

---
updated-dependencies:
- dependency-name: org.codehaus.mojo:mojo-parent
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

README.md

@@ -1,7 +1,7 @@
 # MojoHaus BuildNumber Maven Plugin
 
 This is the [buildnumber-maven-plugin](http://www.mojohaus.org/buildnumber-maven-plugin/).
- 
+
 [![The MIT License](https://img.shields.io/github/license/mojohaus/buildnumber-maven-plugin.svg?label=License)](https://opensource.org/licenses/MIT)
 [![Maven Central](https://img.shields.io/maven-central/v/org.codehaus.mojo/buildnumber-maven-plugin.svg?label=Maven%20Central)](https://search.maven.org/artifact/org.codehaus.mojo/buildnumber-maven-plugin)
 [![Build Status](https://github.com/mojohaus/buildnumber-maven-plugin/workflows/GitHub%20CI/badge.svg?branch=master)](https://github.com/mojohaus/buildnumber-maven-plugin/actions/workflows/maven.yml?query=branch%3Amaster)
@@ -19,3 +19,4 @@ For publishing the site do the following:
 cd target/checkout
 mvn verify site site:stage scm-publish:publish-scm
 ```
+

pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.codehaus.mojo</groupId>
     <artifactId>mojo-parent</artifactId>
-    <version>80</version>
+    <version>84</version>
   </parent>
 
   <artifactId>buildnumber-maven-plugin</artifactId>