libft_2021+ version
How to Run
1. move to `src` folder<br>
2. Enter the `make`<br>
- make library file : make
- clean obj files : make clean
- clean target/lib/obj file : make - fcelan
- make again : make re
- checkout norm : make norm
1. move to `src` folder<br>
2. Enter the `make`<br>