[gjs] (25 commits) ...Merge branch 'mozjs68' into 'master'

[Philip Chimento <pchimento src gnome org>]

Summary of changes:

  00f32d2... build: Change CI to run on mozjs68 images
  a5eead5... build: Build with mozjs68
  e9a802d... js: Remove requests
  7b64462... js: Rename "compartments" to "realms"
  88e5762... js: Rename JS::AutoFooVector
  f052c29... js: Various API renames
  88d01bf... js: Remove hashtable init() calls
  cec9a23... js: Use new warnings API
  1884347... js: Remove handling of shebang line
  3b19f3f... js: Use JS::SourceText to store source code
  5978920... js: Change gjs_string_to_utf8() to return JS::UniqueChars
  5a61545... gerror: Pass null JSPrincipals to saved frame API calls
  8343b7a... object: Use "associated memory" API instead of malloc count
  75eb6e5... byteArray: Use new ArrayBuffer API
  2fe3a1b... global: Use default global ClassOps
  9f7a5ba... engine: Remove locale callbacks
  00f3989... engine: Add missing headers
  b29e836... context: Rewrite promise job queue
  2cf7a6b... jsapi-util-string: Remove no-copy optimization in gjs_strin
  b814915... tests: Minor changes in debugger and coverage expected outp
  a3c8f4c... docs: Update documentation for SpiderMonkey 68
  d783d40... js: Remove jsapi-wrapper.h
  03b463e... tests: Add weak pointer callback in tests with untraced wea
  9445fae... gtype: Don't use lookupForAdd() when adding GType to table
  2c5b21e... Merge branch 'mozjs68' into 'master'