Features:

add stats.excludeAssets to allow to filter assets in list (@ldrick)
add import(/* webpackMode: "weak" */ "module") to try to load a module without network request (@faceyspacey)
add 4. argument to require.context which is the context mode. Can be false, "eager", "lazy-once", "weak" and "async-weak". (@faceyspacey)
require.resolveWeak now support expressions (@faceyspacey)
generate only a single require for modules references in scope-hoisted modules (ModuleConcatenationPlugin)

Bugfixes:

keep correct import order when using the ModuleConcatenationPlugin
Generate shorter, more readable identifiers in ConcatenatedModule
--help output is flushed before process exit (@esbenp)
exit code is reliable reported for CLI validation error (@polomsky)
stats options are now validated by schema (@esbenp)
fixes problem when using the CommonsChunkPlugin in async mode without name argument
fixes description of --resolve-extensions (@tomek-d)
fixes has no internal name when using dependency variable in root of scope-hoisted modules (ModuleConcatenationPlugin)