Can you write a proper CMake library? | homework 📚 

Time for the next homework! You will write a small library for string processing. It will allow you to split and trim strings. Sounds simple, but this is a full-on C++ library with tests and everything. I think it's a good exercise and hope you will enjoy coding it!
The formal homework definition: github.com/cpp-for-yourself/s...
As always, you should upload it to your homeworks repository generated from this template repo: github.com/cpp-for-yourself/h...
Enjoy!