feat(add c implementation): add stats/base/dists/frechet/mean

Author: vivekmaurya001

lib/node_modules/@stdlib/stats/base/dists/frechet/mean/test/test.native.js

@@ -73,7 +73,7 @@ tape( 'if provided a nonpositive `alpha`, the function returns `NaN`', opts, fun
 	y = mean( -1.0, 2.0, 0.0 );
 	t.equal( isnan( y ), true, 'returns NaN' );
 
-	y = mean( NINF, 0.0 );
+	y = mean( NINF, 2.0, 0.0 );
 	t.equal( isnan( y ), true, 'returns NaN' );
 
 	y = mean( NINF, PINF, 0.0 );