Exposure of home directory through shescape on Unix with Bash
### Impact
The issue allows for exposure of the home directory on Unix systems when using Bash with the `escape` or `escapeAll` functions from the _shescape_ API with the `interpolation` option set to `true`. Other tested shells, Dash and Zsh, are not affected.
```javascript
const cp = require("child_process");
const shescape = require("shescape");
const payload = "home_directory=~";
const options = { interpolation: true };
console.log(cp.execSync(`echo ${shescape.escape(payload, options)}`));
// home_directory=/home/user
```
Depending on how the output of _shescape_ is used, directory traversal may be possible in the application using _shescape_.
### Patches
The issue was patched in `v1.5.1`.
### Workarounds
Manually escape all instances of the tilde character (`~`) using `arg.replace(/~/g, "\\~")`.
### References
See GitHub issue
https://github.com/ericcornelissen/shescape/issues/169.