Add support for home directory symbol ~ in file paths

[ckaznable]

I discovered that PathBuf is unable to handle paths with the ~ symbol,. To address this, I used the shellexpand crate to expand the tilde to the actual home directory path.

If any changes are needed, please let me know. Thank you for maintaining this great repository!

[Julien-cpsn]

Closing in favor of #78

I did my own implementation of expand_tilde with the dirs crate because I will use it again in #68