Add docs dependencies.
Add docs dependencies.

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