Integrate into downstream decoders

[springmeyer]

This is a meta ticket to track which decoders mvt-fixtures has been integrated into.

Once #15 is done, it will be time to use the latest mvt-fixtures in:

High priority:

• https://github.com/mapbox/vtzero | Integrate mvt-fixtures@3.0.0 vtzero#2
• vtquery | Profiling benchmarks vtquery#38
• vt-shaver-cpp | https://github.com/mapbox/vt-shaver-cpp/pull/94
• vtvalidate | Use vtzero to simple parse and validate geoms vtvalidate#1
• https://github.com/mapbox/vector-tile-js | Use mvt-fixtures for testing valid/invalid vector tiles? vector-tile-js#59
• https://github.com/mapbox/vector-tile-cs | Update tests to latest 'mvt-fixtures' vector-tile-cs#34
• mapbox-gl-js | Added mvt-fixtures' real-world integration tests mapbox-gl-js#6250

Mid priority:

• https://github.com/mapbox/vector-tile-base | NEEDS TICKET
• https://github.com/mapbox/mapnik-vector-tile | Integrate mvt-fixtures@3.0.0 mapnik-vector-tile#255