• Updated version of google/bazel-common being depended on.
• Updated code formatting across whole codebase to conform more adequately with google/google-java-format.
• Added support for optional keyword on select message fields to support upcoming proto3 feature.
• Regenerated javadocs

Minor updates to Bazel to fix deprecation errors.
Introduces inferrable OptionSpec.Builder.setValue builder method.

• Tested with latest version of Guava (v27.1, at time of release).
• OptionSpec now allows caller to provide paren wrapped names to explicitly control wrapping.

• Migrating underlying dependencies to bazel-common
• Adding build target that creates a master jar of all of protopoet. Note, I've removed all other jar releases from this github since they were likely broken.

Some minor API adjustments to make it easier to integrate Protopoet into other projects.

Learn more about usage/API: https://derek.perez.earth/protopoet