Breaking Changes

config options have moved
- cache.managedPaths/immutablePaths -> snapshot.managedPaths/immutablePaths
- output.hotUpdateFunction -> output.hotUpdateGlobal
- output.jsonpFunction -> output.chunkLoadingGlobal
- output.chunkCallbackFunction -> output.chunkLoadingGlobal

Features

new RegExp() can be evaluated now, e. g. when used in require.context
add additional logging for FileSystemInfo regarding snapshotting
new config options how snapshots are created.
- snapshot.module: Snapshots for building of modules
- snapshot.resolve: Snapshots for resolving of requests
- snapshot.buildDependencies: Snapshots for build dependencies when using the persistent cache
- snapshot.resolveBuildDependencies: Snapshots for resolving of build dependencies when using the persistent cache
new options:
- output.chunkLoading: The method of loading chunks (methods included by default are 'jsonp' (web), 'import-scripts' (WebWorker), 'require' (sync node.js), 'async-node' (async node.js), but others might be added by plugins).
- output.chunkFormat: The format of chunks (formats included by default are 'array-push' (web/WebWorker), 'commonjs' (node.js), but others might be added by plugins).
- defaults are chosen based on target option
- output.enabledChunkLoadingTypes: List of chunk loading types enabled. Will be automatically filled by webpack. Only needed when using a function as entry option and returning chunkLoading option from there.
- entry.*.chunkLoading: Like output.chunkLoading but only for this entry.
output.library and output.chunkLoading now also allow any string in schema, to support adding custom types via plugins.

in production mode module snapshotting will use timestamp + hash mode to allow persistent caching on CI
output.globalObject defaults to self instead of window of web-like targets

fix generated code for export default function*() {}
allow caching of modules that are not parsed because of module.noParse
fix generated code of new.target
avoid using require("module").builtinModules for getting node.js built-in modules
fix watching when more than 2000 directories are watched on MacOS

Performance improvements for snapshotting
- snapshot content other than file timestamps is deduplicated
lazy deserialize inner source in CachedSource
avoid touching LazySet for cache dependencies from ModuleFactory to avoid eager merging
refactor how cache dependencies are read from Modules for performance
store cache dependencies instead of Snapshot to avoid duplicate serialization and allow deduplication
create multiple files when more then 50k cache items are stored at once
optimize serialization of lazy deserialized content in BinaryMiddleware