Bump com.vanniktech.maven.publish from 0.17.0 to 0.18.0 (#136)

Bumps [com.vanniktech.maven.publish](https://github.com/vanniktech/gradle-maven-publish-plugin) from 0.17.0 to 0.18.0.
- [Release notes](https://github.com/vanniktech/gradle-maven-publish-plugin/releases)
- [Changelog](https://github.com/vanniktech/gradle-maven-publish-plugin/blob/master/CHANGELOG.md)
- [Commits](vanniktech/gradle-maven-publish-plugin@0.17.0...0.18.0)

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

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build.gradle

@@ -9,7 +9,7 @@ plugins {
     id("me.champeau.gradle.jmh") version "0.5.3"
     id("com.github.hierynomus.license") version "0.16.1"
     id("biz.aQute.bnd.builder") version "5.3.0"
-    id("com.vanniktech.maven.publish") version "0.17.0"
+    id("com.vanniktech.maven.publish") version "0.18.0"
 }
 
 sourceCompatibility = JavaVersion.VERSION_1_8