[gjs] (21 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:

  038f848... js: Refactor dual use of JS::Heap wrapper
  0fb0546... build: Build with mozjs38
  597bfe9... js: AutoValueVector's [] operator is rooted
  fb583c5... js: Adapt to new JS_NewObject() API
  a297e93... js: Adapt to new JS_DefinePropertyById() API
  9e1292d... js: Rename JS_CallHeapFooTracer()
  99a3eb9... js: Discontinue JSClass stubs
  2a3a55b... js: Adapt to new JS_SetErrorReporter() API
  496cf4e... constructor-proxy: Adapt to new js::DirectProxyHandler API
  6f1a7ec... runtime: Adapt to new JSFinalizeCallback
  ab8afce... js: Adapt to new mozilla::Maybe API
  62c4860... js: Adapt to new signature of resolve operation
  bff93a2... js: Accommodate both Latin-1 and two-byte strings
  d8bc47a... js: JSNative accessors in JS_DefineProperty()
  18ff0a3... js: Fix misc APIs for mozjs38
  c721ded... js: Various SpiderMonkey 38 improvements
  9447cfd... WIP - Switch to new JSClass.enumerate
  e8dbb23... WIP - weak pointers

Commits added to the branch:

  d4d83e9... importer: Remove unused variable (*)
  0b9ad76... gi: Cleanup gjs_define_gi_stuff() (*)
  6bb97c6... js: Refactor dual use of JS::Heap wrapper
  a6c9b78... WIP - make closure lifetime less complicated?
  9312b38... build: Build with mozjs38
  06433f3... js: AutoValueVector's [] operator is rooted
  18db4d8... js: Adapt to new JS_NewObject() API
  2d9ddd2... js: Adapt to new JS_DefinePropertyById() API
  5b06576... js: Rename JS_CallHeapFooTracer()
  5121d42... js: Discontinue JSClass stubs
  68526c7... js: Adapt to new JS_SetErrorReporter() API
  7964ff1... constructor-proxy: Adapt to new js::DirectProxyHandler API
  38db158... runtime: Adapt to new JSFinalizeCallback
  6519f17... js: Adapt to new mozilla::Maybe API
  08be1f9... js: Adapt to new signature of resolve operation
  a769db6... js: Accommodate both Latin-1 and two-byte strings
  d7bf1c6... js: JSNative accessors in JS_DefineProperty()
  5973c8b... js: Fix misc APIs for mozjs38
  b70b3fa... js: Various SpiderMonkey 38 improvements
  3689797... WIP - weak pointers
  2cef79a... WIP - Switch to new JSClass.enumerate

(*) This commit already existed in another branch; no separate mail sent