Return a camelCased input.
0.1.0
input (string)
(string): Returns camelCased input.
piupiu.camelCase('im a string');
// 'imAString'piupiu.camelCase('imastring');
// 'imastring'piupiu.camelCase('Im a String');
// 'imAString'piupiu.camelCase(0);
// undefined'piupiu.camelCase(null);
// undefined'