function ceil10( x ) {
	return addon( x );
}
Rounds a numeric value to the nearest power of `10` toward positive infinity.

@private
@param {number} x - input value
@returns {number} rounded value

@example
var v = ceil10( 3.141592653589793 );
// returns 10.0

@example
var v = ceil10( 9.0 );
// returns 10.0

@example
var v = ceil10( -0.314 );
// returns -0.1