Merge branch '8.0' into 8.1

* 8.0: (21 commits)
  [ObjectMapper] mapping of nested classes with promoted read-only properties
  [Routing] Fix case sensitivity for static host matching in compiled routes
  [Routing] Fix localized prefix updates breaking aliases
  [Routing] Fix addNamePrefix breaking aliases to external routes
  [Workflow] Fix MethodMarkingStore crash with inherited uninitialized properties
  [AssetMapper] Fix entrypoint status lost during update
  [ObjectMapper] map to embedded object with property access
  [FrameworkBundle] Make `APP_*_DIR` relative to the project directory
  [FrameworkBundle] Dump all registered extensions’ configuration reference
  fix merge
  Mark FormFlow as finished if the last step is skipped
  [HttpKernel] Fix using MapRequestPayload on nullable arguments
  [ObjectMapper] bypass lazy ghost with class transform
  [WebProfilerBundle] fix displaying runner
  Remove outdated changelogs and upgrade guides
  [DependencyInjection] Fix preloading LazyClosure
  [Emoji] Update list to version 17
  make doLoadClassMetadata() methods private
  fix routing config type information
  [Console] Fix completion for global options values
  ...

Author: nicolas-grekas