Bump biz.aQute.bnd.gradle from 6.3.1 to 6.4.0 (#156)

Bumps [biz.aQute.bnd.gradle](https://github.com/bndtools/bnd) from 6.3.1 to 6.4.0.
- [Release notes](https://github.com/bndtools/bnd/releases)
- [Changelog](https://github.com/bndtools/bnd/blob/master/docs/ADDING_RELEASE_DOCS.md)
- [Commits](bndtools/bnd@6.3.1...6.4.0)

---
updated-dependencies:
- dependency-name: biz.aQute.bnd:biz.aQute.bnd.gradle
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

build.gradle

@@ -10,7 +10,7 @@ buildscript {
         classpath "gradle.plugin.com.hierynomus.gradle.plugins:license-gradle-plugin:0.16.1"
         classpath "me.champeau.gradle:jmh-gradle-plugin:0.5.3"
         classpath 'ru.vyarus:gradle-animalsniffer-plugin:1.6.0'
-        classpath "biz.aQute.bnd:biz.aQute.bnd.gradle:6.3.1"
+        classpath "biz.aQute.bnd:biz.aQute.bnd.gradle:6.4.0"
         classpath 'com.vanniktech:gradle-maven-publish-plugin:0.18.0'
     }
 }