Bump net.sf.mpxj:mpxj from 10.14.0 to 12.0.0

Bumps [net.sf.mpxj:mpxj](https://github.com/joniles/mpxj) from 10.14.0 to 12.0.0.
- [Release notes](https://github.com/joniles/mpxj/releases)
- [Changelog](https://github.com/joniles/mpxj/blob/master/CHANGELOG.md)
- [Commits](joniles/mpxj@v10.14.0...v12.0.0)

---
updated-dependencies:
- dependency-name: net.sf.mpxj:mpxj
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

biz.ganttproject.impex.msproject2/build.gradle

@@ -8,7 +8,7 @@ configurations {
 
 dependencies {
     providedCompile project(path: ':ganttproject', configuration: 'exported')
-    api('net.sf.mpxj:mpxj:10.14.0') {
+    api('net.sf.mpxj:mpxj:12.0.0') {
         exclude group: 'org.xerial', module: 'sqlite-jdbc'
         exclude group: 'com.jgoodies'
     }