function charAt(subject, position) {
    var subjectString = coerceToString(subject);
    return subjectString.charAt(position);
  }
Access a character from `subject` at specified `position`.

@function charAt
@static
@since 1.0.0
@memberOf Chop
@param  {string} [subject=''] The string to extract from.
@param  {numbers} position The position to get the character.
@return {string} Returns the character at specified position.
@example
v.charAt('helicopter', 0);
// => 'h'

v.charAt('helicopter', 1);
// => 'e'