bench: use powf in lucasf

PR-URL: #9193
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: sagar7162

lib/node_modules/@stdlib/math/base/special/lucasf/benchmark/benchmark.js

@@ -23,7 +23,7 @@
 var bench = require( '@stdlib/bench' );
 var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
 var roundf = require( '@stdlib/math/base/special/roundf' );
-var pow = require( '@stdlib/math/base/special/pow' );
+var powf = require( '@stdlib/math/base/special/powf' );
 var isnanf = require( '@stdlib/math/base/assert/is-nanf' );
 var PHI = require( '@stdlib/constants/float32/phi' );
 var zeros = require( '@stdlib/array/base/zeros' );
@@ -68,8 +68,7 @@ bench( pkg+'::analytic', function benchmark( b ) {
 	});
 
 	function lucasf( n ) {
-		// TODO: replace with `powf` when available
-		return roundf( pow( PHI, n ) );
+		return roundf( powf( PHI, n ) );
 	}
 
 	b.tic();