The simplest slugify module in the universe.
Any input character that is not a-z, 0-9 or - will be lowercased or replaced with a hyphen.
- Therefore, use other modifiers beforehand, e.g. 
diacritics 
Resulting values:
- Only contain 
a-z,0-9,- - Do not contain leading or trailing hyphens
 - Do not contain repeating hyphens
 
$ npm install skeweredconst skewered = require("skewered");
const before =
  "- (this),is.a+test-that*must:work;or&else#it%fails big/*/time  1'2'3 123--xyz----Möbius _";
const after =
  "this-is-a-test-that-must-work-or-else-it-fails-big-time-1-2-3-123-xyz-m-bius";
console.log(skewered(before) === after);
//=> trueISC © Buster Collings