[gjs] (17 commits) Non-fast-forward update to branch wip/ptomato/mozjs38

[Philip Chimento <pchimento src gnome org>]

The branch 'wip/ptomato/mozjs38' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  6fd49fd... WIP - mozjs38

Commits added to the branch:

  4a19b11... build: Build with mozjs38
  d361934... js: AutoValueVector's [] operator is rooted
  14b3279... js: Adapt to new JS_NewObject() API
  7b6fb1f... js: Adapt to new JS_DefinePropertyById() API
  f28ae2b... js: Rename JS_CallHeapFooTracer()
  44aab7d... js: Discontinue JSClass stubs
  4d0f498... js: Adapt to new JS_SetErrorReporter() API
  9bedeba... constructor-proxy: Adapt to new js::DirectProxyHandler API
  3e178ae... runtime: Adapt to new JSFinalizeCallback
  e95df70... WIP - Adapt to new mozilla::Maybe API
  1fa4453... WIP - Adapt to new signature of resolve operation
  95824a6... WIP - js: Remove JSCLASS_NEW_RESOLVE where not used
  749c4ce... WIP - Use PersistentRooted in GjsCallbackTrampoline
  55a74df... WIP - object.cpp weak pointer callback
  e76916f... WIP - Switch to new JSClass.enumerate
  ad63fe1... WIP - Adapt to new JS::Heap API
  55ca645... WIP - mozjs38