Script to automatically update all library versions

Similar to Maven commands like:
- [`mvn versions:use-latest-versions`](https://www.mojohaus.org/versions-maven-plugin/use-latest-releases-mojo.html)
- [`mvn versions:use-latest-releases`](https://www.mojohaus.org/versions-maven-plugin/use-latest-versions-mojo.html)
- [`mvn versions:update-properties`](https://www.mojohaus.org/versions-maven-plugin/update-properties-mojo.html)

And just to spam more keywords, here are some Maven commands that display updates but don't make the changes:
- `mvn versions:display-property-updates`
- `mvn versions:display-dependency-updates`

I poked around the web and found some a project for keeping Bazel deps up to date, but it has its own system that might not play well with `bazel-common`:
https://github.com/johnynek/bazel-deps

I notice that it's mentioned in:
https://github.com/bazelbuild/BUILD_file_generator#third-party-maven-dependencies