function isCamelcase( value ) {
	return (
		isString( value ) &&
		value === camelcase( value )
	);
}
Tests if a string is in camelcase.

@param {*} value - value to test
@returns {boolean} boolean indicating whether a string is in camelcase

@example
var bool = isCamelcase( 'beepBoop' );
// returns true

@example
var bool = isCamelcase( 'beepBoop123' );
// returns true

@example
var bool = isCamelcase( 'beep Boop' );
// returns false

@example
var bool = isCamelcase( 'beep' );
// returns true