Write a program that takes a number as argument and it returns the number in roman number.
Example results:
1 >> I
2 >> II
3 >> III
4 >> IV
5 >> V
9 >> IX
21 >> XXI
50 >> L
97 >> XCVII
100 >> C
500 >> D
1000>> M
To run the tests, execute:
npm i to install the depencencies and then
npm run test to run the tests