Changeable keybindings for all keybindings

Please add changeable keybindings for all of the minecraft keybindings such as the keybinding to get to the options menu. This would be super help full because it would make for more customizable keybindings, it would also help issues where two keybindings collided and caused issues For example in my situation the keybinding that I have for squatting is E and the unchangeable keybinding for getting off a rideable entity is E so when I get off I squat which is super annoying and there is no way to fix that except by changing the squat keybinding which I do not want to change. 

Thank you for reading.