Gophercises Quiz Push: Add AnhellO's solution. January 1st, 2021

[AnhellO]

Adding my solution for this cool gophercise.

You can test it by executing some of the following commands:

• go run main.go to execute it with the default 30 secs time and the default quiz file
• go run main.go -timer=15 -file=other-file.csv to change the default time and use a different quiz file