Specify version of glfw needed.
I ran into this error `AttributeError: module 'glfw' has no attribute 'set_window_size_limits'`
after installing what I think is the latest glfw version by running `apt-get install libglfw3` on Ubuntu since the glfw package from the README wasn't located. I wanted to check if the versions match but they aren't specified in the README. Could you please specify them/it?