Bump com.vanniktech.maven.publish from 0.27.0 to 0.28.0

Bumps [com.vanniktech.maven.publish](https://github.com/vanniktech/gradle-maven-publish-plugin) from 0.27.0 to 0.28.0.
- [Release notes](https://github.com/vanniktech/gradle-maven-publish-plugin/releases)
- [Changelog](https://github.com/vanniktech/gradle-maven-publish-plugin/blob/main/CHANGELOG.md)
- [Commits](vanniktech/gradle-maven-publish-plugin@0.27.0...0.28.0)

---
updated-dependencies:
- dependency-name: com.vanniktech.maven.publish
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

MPChartLib/build.gradle

@@ -2,7 +2,7 @@ plugins {
     id 'com.android.library'
     id 'maven-publish'
     id 'kotlin-android'
-    id "com.vanniktech.maven.publish" version "0.27.0"
+    id "com.vanniktech.maven.publish" version "0.28.0"
 }
 
 ext {