v0.86.0

• [Breaking]: Metro now always emits whole-bundle source maps as index maps, and stores each module's map internally as a VlqMap (#1764, #1765 by @robhogan). Custom serialisers/transformers must consume/provide VlqMap mappings, not tuples.
• [Breaking]: Remove deprecated default exports from public entry points (#1759 by @robhogan)
• [Breaking]: Remove support for deprecated YAML and .es6 config files (#1752 by @robhogan)
• [Breaking]: Remove long-deprecated resolver.blacklistRE config in favour of blockList (#1758 by @robhogan)
• [Fix]: Fix HttpStore write retries incorrectly using the read endpoint's config (#1751 by @durvesh1992)
• [Performance]: Source maps work makes Metro use 50% less memory and serve source maps 2x faster, for faster RNDT loads (#1741, #1742, #1743, #1760, #1763, #1764, #1765 by @robhogan)

Full Changelog: v0.85.0...v0.86.0