Java Buildpack v2.1.1

I'm pleased to announce the release of the java-buildpack, version 2.1.1. This release fixes a bug that prevented Spring Boot applications from staging properly.

For a more detailed look at the changes in 2.1.1, please take a look at the commit log. Packaged versions of the buildpack, suitable for use with create-buildpack and update-buildpack, can be found attached to this release.