feature: added deep copy option to options helper
feature: added deep copy option to options helper

eric-seekas/PhysicsJS,rohit765/PhysicsJS,haithemaraissia/PhysicsJS,rohit765/PhysicsJS,pietro909/PhysicsJS,VANITAX/PhysicsJS,Luwdo/PhysicsJS,Nayar/PhysicsJS,mcanthony/PhysicsJS,Nayar/PhysicsJS,Luwdo/PhysicsJS,eric-seekas/PhysicsJS,mcanthony/PhysicsJS,wellcaffeinated/PhysicsJS,VANITAX/PhysicsJS,Rawneed/PhysicsJS,haithemaraissia/PhysicsJS,Rawneed/PhysicsJS,jpellerin/PhysicsJS,jpellerin/PhysicsJS,wellcaffeinated/PhysicsJS,griever989/PhysicsJS,pietro909/PhysicsJS,griever989/PhysicsJS