v1.1.3

• Grating coupler: make_traditional_coupler now allows to apodize the period of the grating
• Port: added with_width function to generate a copy of the Port with a certain width
• Increased precision in add_straight_segment by evaluating derivative
• Added add_route_straight_to_port to Waveguide
• Fixed evaluation of width-parameter in add_parametrized_path
• Stopped testing with Python 3.5, as it reached it's end-of-life and added a warning
• Deprecated gdsCAD, as it isn't compatible with Python 3
• Fixed cell.show