branch dev0.0.22
modify README.md (typo) , package.json (keywords) , src/client.cc (CoCreateInstance) , src/force_gc_extension.cc (TryCatch / Persistent / Dispose)
test src/client.cc CoCreateInstance() with CLSCTX_ACTIVATE_32_BIT_SERVER and CLSCTX_ACTIVATE_64_BIT_SERVER
modify src/client.cc (call CoCreateInstance twice when need it)