v0.9.4

IMPROVEMENTS:

• [quickjs.impl] add valuetype optimization
• [quickjs.impl] possible to build for Web with use_quickjs=yes (not tested)
• Generate .gdignore in node_modules anyway when starting up the editor

BUGFIX

• a crash issue caused by unbalanced reference counting in bind_godot_object/finalizer
• a crash issue in TimerManager::invoke_timers
• [quickjs.impl] fix crash issues on disposing quickjs.impl's Isolate