[gjs] (15 commits) ...Merge branch 'january-maintenance' into 'master'

[Philip Chimento <pchimento src gnome org>]

Summary of changes:

  2e2eca5... libgjs-private: Mark function as static
  df768ea... libgjs-private: Export GjsDBusImplementation unexport metho
  0cc5487... doc: Add unexport_from_connection() to Gio module documenta
  6afbfd9... arg-cache: Update comment
  ee46d3c... context: Clarification in GjsContextPrivate::handle_exit_co
  c79fed2... object: Add null check for debug assertion
  a346d14... build: Skip running minimal SpiderMonkey program on cross b
  854670c... maint: Add common build directory names to eslintignore
  80265ba... object: Don't fetch property descriptor on interface
  0250359... object: Fix interface property descriptor flags
  2998df3... jsapi-util: Remove return value of gjs_log_exception_full()
  0fa486a... jsapi-util: Refactor gjs_log_exception_full()
  f1b47f2... jsapi-util: Include column number in SyntaxError output
  7abaa6c... debugger: Handle EOF at debugger prompt correctly
  1c38cb4... Merge branch 'january-maintenance' into 'master'