Metro Files

• [Feature]: Add resolver.schemeResolvers to resolve URI-scheme-prefixed specifiers (eg foo:bar) with custom resolvers (https://github.com/react/metro/pull/1804 by @robhogan)
• [Feature]: Resolve metro:babel-runtime/<path> imports to Metro's own @babel/runtime dependency (https://github.com/react/metro/commit/8388f719f9c8d19c7417cc59e592690fa20f5f98 by @robhogan)
• [Feature]: metro-babel-transformer: Pass inlinePlatform to Babel presets via caller (https://github.com/react/metro/commit/6bbe095c127803c62402c2a21d7b2bb819f1b11e by @robhogan)
• [Fix]: Replace image-size dependency with vendored parsers, fix CVE alerts (https://github.com/react/metro/pull/1860 by @robhogan)
• [Fix]: Include charset=utf-8 in the Content-Type of text assets and source files served by the dev server (https://github.com/react/metro/pull/1888 by @robhogan)
• [Fix]: Preserve Platform.OS write targets during constant inlining (https://github.com/react/metro/pull/1890 by @OskarEichler)
• [Fix]: Inline the last duplicate key from static Platform.select object literals (https://github.com/react/metro/pull/1889 by @OskarEichler)
• [Fix]: FallbackWatcher no longer misses files written to a directory while it is being crawled (https://github.com/react/metro/pull/1907 by @robhogan)
• [Fix]: HttpStore: Handle socket errors during writes, so they're retried rather than crashing the process (https://github.com/react/metro/commit/fad3b88742034a8c1cbb9cc098fd35128b597870)
• [Fix]: Treat CI=false and CI=0 as not-CI when defaulting watch. CI is now detected from process.env.CI only, dropping the ci-info dependency (https://github.com/react/metro/commit/61e4592f92f028d3c5f33af101d41654e88fe151 by @robhogan)
• [Fix]: Fix Fast Refresh hitting undefined modules when using lazy (segmented) bundles in dev (https://github.com/react/metro/commit/c70d0ae66cf381d50e1fc59c4c4aa806d050e9dd by @robhogan)
• [Performance]: FallbackWatcher: Drop walker dependency, reduce crawl RSS by ~34% and peak heap by ~41% (https://github.com/react/metro/pull/1906 by @robhogan)
• [Performance]: Don't emit redundant empty dependency map arrays for modules with no dependencies (https://github.com/react/metro/pull/1858 by @robhogan)
• [Types]: Restore publishing of private (underscore-prefixed) fields in TypeScript declarations (https://github.com/react/metro/pull/1876 by @robhogan)
• [Types]: Fix async functions being inferred as returning void (not Promise<void>), eg MetroServer#end (https://github.com/react/metro/pull/1909 by @robhogan)
• [Types]: Tidy up generated types, allow nullable props to be omitted in more places (https://github.com/react/metro/pull/1885 by @robhogan)

NOTE: Experimental features are not covered by semver and can change at any time.

• [Experimental]: metro-file-map: Add crawlerFactory to optionally replace the built-in Watchman / Node crawlers (https://github.com/react/metro/commit/68022f046321b84758b7073c13c2db1072a14b27 by @vzaidman)
• [Experimental]: Add serializer.unstable_inlineDependencyMap to inline module IDs at serialisation time (https://github.com/react/metro/pull/1786 by @robhogan)
• [Experimental]: Add serializer.unstable_getAsyncDependencyPath to supply custom paths to framework-defined __loadBundleAsync (https://github.com/react/metro/pull/1855 by @robhogan)
• [Experimental]: Remove transformer.unstable_renameRequire - require is never renamed (https://github.com/react/metro/commit/42577f778195d40a0fe31af5c34ec679d00bc9b2 by @robhogan)
• [Experimental]: experimentalImportSupport: Fix export * from re-exporting the source module's default export (https://github.com/react/metro/pull/1777 by @robhogan)

Full Changelog: https://github.com/react/metro/compare/v0.87.0...v0.87.1