[Pharo 8.0] Build #919: Update Tonel to v1.0.15

There is a new Pharo build available!
 
The status of the build #919 was: SUCCESS.

The Pull Request #5022 was integrated: "Update Tonel to v1.0.15"
Pull request url: https://github.com/pharo-project/pharo/pull/5022

Issue Url: https://github.com/pharo-project/pharo/issues/update
Build Url: https://ci.inria.fr/pharo-ci-jenkins2/job/Test%20pending%20pull%20request%20and%20branch%20Pipeline/job/Pharo8.0/919/