Add unit-tests for the Mazevo events parser in parser/mazevoParser.go

[mikehquan19]

Add unit tests for the mazevo events parser using Go's built-in testing library.

Follow the current structure of the unit-tests, which means a file _test.go is associated with the file of the main code.

Be sure to seek out resources for details on how to write good unit tests if you are unsure. Also make sure to check the coverage of the test because the higher the coverage, the better.

[SuchDominion]

mind if I take this? Would follow the cometCalendarParser_test.go style.