Continuously update dependencies in examples

[hansenmc]

While investigating issues reported for issue #373 I was having trouble reproducing the symptoms. It turned out that the dependencies in the example/corb build.gradle had an old version of ml-gradle and corb.

It would be nice if the dependencies (and the gradlew) were kept up to date with the most recent versions. Especially for ml-gradle.

It might be worth configuring https://dependabot.com/ to help monitor the primary build.gradle, as well as each of the examples build files. Dependabot will automatically submits PRs with changes to the gradle.build, which is super convenient and easy.