Exercise 1: Convert input from str -> float

In: https://github.com/equinor/tdd_workshop/blob/fcda46100696213403c78bf576433705f8613fea/src/tdd_workshop/io.py#L9 we are reading a file and turning it into a list of coordinates. However that function returns a list of tuples of strings. As we are doing calculations on the results, we would like it to return float values instead of strings.

1) Run the test
2) Modify the tests to be red, and confirm that you get the desired result by running the tests
3) Refactor the code until you are back to green.