fix(degreeworks): duplicate courses

[HwijungK]

Description

back in #286 when the logic was changed in AuditParser.ts to filter out courses that didn't meet a minimum unit requirement, the map toInclude, which mapped course ids to course objects, was turned to type [string, course][].

Degreeworks requirements can return duplicate courses in a requirement, for example:

Information and Computer Science Minor (459) has a requirement, "2 upper-div courses from list" with a course list that contains both COMPSCI 111-144 and COMPSCI 122@, which when normalized, would result in duplicate courses. Not having ToInclude be a map meant courses were added multiple times.

Simply turning the variable back into a map solves the duplicate course issue.

Related Issue

#324

How Has This Been Tested?

iterated through requirements across all majors and minors and searched for duplicate course

Types of changes

• [ x] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code involves a change to the database schema.
• My code requires a change to the documentation.

[laggycomputer]

Seems legit, no notes. Do you remember why you changed this away from a map in the previous PR?