fix: replace new Array() with array literal and push in wilcoxon examples

Replace `new Array( 100 )` with `arr = []` and `arr.push()` to comply
with stdlib/no-new-array linting rule. ES5-compatible solution.

Ref: #10943

Author: Sumithraju

lib/node_modules/@stdlib/stats/wilcoxon/examples/index.js

@@ -29,9 +29,9 @@ var i;
 runif = uniform( -50.0, 50.0, {
 	'seed': 37827
 });
-arr = new Array( 100 );
-for ( i = 0; i < arr.length; i++ ) {
-	arr[ i ] = runif();
+arr = [];
+for ( i = 0; i < 100; i++ ) {
+	arr.push( runif() );
 }
 
 // Test whether distribution is symmetric around zero: