Remove google-collections dependency #65
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google-collections is old and has been succeeded by google-guava. It was only used in unit tests cases for the convenience of constructing small maps. These can be mostly replaced with Collections.singletonMap. Having it as a compile dependency meant that this was propagated to dependent projects.
Theoretically a dependent project could be relying on this transitive dependency and break when it is removed, so I think this should be a minor version bump.