feat(conventions): include maven central as a default repository (spi…

…nnaker#161)

fix(*): Support for parsing boolean project properties (spinnaker#158)

Prior to this fix, any intended boolean project property (ie. `-PbintrayPublishDebEnabled`) would
be interpreted as `true` apparently due to how `asType()` works.

feat(compatibility): allow optional tests (spinnaker#156)

feat(test-runner): export compatibility metadata to plugin-info.json (s…

…pinnaker#153)

chore(java11): Target Java 11

feat(tests): allow version aliases in compatibility block (spinnaker#152

)

feat(plugins): add compatibility test runner (spinnaker#151)

feat(javac): add a `targetJava11` project property (spinnaker#149)

If set, we'll use `-source 11 -target 11` instead of `1.8`. Now that Netflix is moving to the Java 11 runtime, we can start using Java 11 language features. So I'll start migrating all the microservices.

fix(plugins): Exclude third party libraries from plugin classes direc…

…tory (spinnaker#148)

chore(formatting): upgrade spotless, ktlint, and google-java-format (s…

…pinnaker#147)

There are some minor formatting changes that will need to be applied to each project now. I'll probably kill the bumpdeps action so I can do those manually.