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

[Cosimo Cecchi <cosimoc src gnome org>]

Summary of changes:

  4be70fa... jsapi-class: Fix comment
  11d5d47... jsapi-class: Make parameter const-correct
  8febd51... mem: Split memory counters into private header
  e75d61d... fundamental: Remove obsolete comments
  2a387c0... object: Rename ObjectPrototype::new_for_js_object()
  085cc9c... js: Handle errors in gjs_intern_string_to_id()
  f4fcfa8... mem: Only print counter totals if >0
  9fee7ca... fundamental: Fix error handling in find_fundamental_constru
  7c8f0e6... gi: Rename "proxy" to "wrapper"
  ad8a692... js: Factor out definition of '$gtype' property
  f87e0b6... tests: Fix typo
  8055d94... module: Add memory counters
  da01503... wrapperutils: Make native address const
  6635a41... repo: Fix error handling in lookup functions
  c891f06... Merge branch 'december-maintenance' into 'master'