chore: remove shortid, add nanoid

[nkgardose]

Fixes #211

[nkgardose]

@TimboKZ Hey, shortid is deprecated and is dependent on an older version of nanoid which causes a dependabot alert due to security issues. Just FYI

Warning

When nanoid is called with a fractional value, there were a number of undesirable effects:

1. in browser and non-secure, the code infinite loops on while (size--)
2. in node, the value of poolOffset becomes fractional, causing calls to nanoid to return zeroes until the pool is next filled
3. if the first call in node is a fractional argument, the initial buffer allocation fails with an error

Version 3.3.8 and 5.0.9 are fixed.

Let me know if these changes are good for you. Feel free to update, approve, or merge as you wish. Thanks!

[nkgardose]

@TimboKZ Would highly appreciate it if you can check this out. Thanks!