Multiple academic years for courses #14
Description
Is your feature request related to a problem? Please describe.
Currently, our course parsing algorithms work to parse 2019-2021.
Describe the solution you'd like
We would like that extended back. There should also be some changes to our DB to allow to specify which year of a course we are referring to.
Additional context
Use the year in the URL as a way to specify.
https://ucalendar.uwaterloo.ca/2021/COURSE/course-MATH.html
https://ucalendar.uwaterloo.ca/1920/COURSE/course-MATH.html
https://ucalendar.uwaterloo.ca/1819/COURSE/course-MATH.html
etc.