function Voca(subject) {
    return new ChainWrapper(subject, false);
  }
Creates a chain object that wraps `subject`, enabling <i>implicit</i> chain sequences.<br/>
A function that returns `number`, `boolean` or `array` type <i>terminates</i> the chain sequence and returns the unwrapped value.
Otherwise use `v.prototype.value()` to unwrap the result.

@memberOf Chain
@since 1.0.0
@function v
@param {string} subject The string to wrap.
@return {Object}  Returns the new wrapper object.
@example
v('Back to School')
 .lowerCase()
 .words()
// => ['back', 'to', 'school']

v(" Back to School ")
 .trim()
 .truncate(7)
 .value()
// => 'Back...'