add `experiments.backCompat: false` (default in `experiments.futureDefaults`)
remove unused `experiments.asset`
enable `experiments.topLevelAwait` and `experiments.asyncWebAssembly` by default in `experiments.futureDefaults`
to keep track of runtimes, used exports depending on runtime
modules can have different hashes and generated code depending on runtime
chunks are only considered as equal for MergeDuplicateChunks and SplitChunks when exports used in contained modules are equal
added `optimization.usedExports: "global"` to opt-out from used exports analysis per runtime
added `splitChunks.usedExports` and `splitChunks.cacheGroups[x].usedExports` to enable/disable used exports comparing for modules
`splitChunks.usedExports` defaults to `true` in production
deprecate writing to compilation.assets after sealing.
merge all asset processing into single hook with stages.
Deprecate additionalChunkAssets and optimizeChunkAssets.
Redirect additionalAssets, optimizeAssets to processAssets for backward-compat.
Remove finishAssets hook without deprecation as it was not in v4.
add code generation phase to Compilation
add `output.iife` options to remove iife wrapper
add `experiments.outputModule` which enabled `output.module`
add `output.module` which sets defaults to `output.iife: false`, `output.libraryTarget: "module"`, `output.jsonpScriptType: "module"`, `terserOptions.module: true`
add `output.module` example
improve runtime requirements needed by ConcatenatedModule
add entry inlining, which inlines entry module code into runtime scope (only when safe)
make whole bundle strict when all modules are strict
add asset info with
* immutable for long term cache-able asset
* size for the asset size in bytes
* development for devtools
* hotModuleReplacement for HMR assets
show asset info in stats
use variable tagging in harmony pluging (instead of magic renaming)
Parser no longer calls hooks.expression for x in `x = ...`, hooks.pattern is called instead
remove rootName argument from hooks.expressionMemberChain and hooks.callMemberChain