Update .gitignore for JS binding
Update .gitignore for JS binding

Lucsanszky/gym-http-api,Lucsanszky/gym-http-api,Lucsanszky/gym-http-api,Lucsanszky/gym-http-api,Lucsanszky/gym-http-api,Lucsanszky/gym-http-api,Lucsanszky/gym-http-api,Lucsanszky/gym-http-api,Lucsanszky/gym-http-api