fix: support bigint stats in Nodejs v18.7+

closes #359

Author: 3cp

lib/item.js

@@ -1,5 +1,15 @@
 'use strict';
 
+const fsBinding = process.binding('fs');
+const statsConstructor = fsBinding.statValues
+  ? fsBinding.statValues.constructor
+  : Float64Array;
+// Nodejs v18.7.0 changed bigint stats type from BigUint64Array to BigInt64Array
+// https://github.com/nodejs/node/pull/43714
+const bigintStatsConstructor = fsBinding.bigintStatValues
+  ? fsBinding.bigintStatValues.constructor
+  : BigUint64Array;
+
 let counter = 0;
 
 /**
@@ -280,7 +290,9 @@ Item.prototype.setGid = function(gid) {
  * @return {Object} Stats properties.
  */
 Item.prototype.getStats = function(bigint) {
-  const stats = bigint ? new BigUint64Array(36) : new Float64Array(36);
+  const stats = bigint
+    ? new bigintStatsConstructor(36)
+    : new statsConstructor(36);
   const convert = bigint ? v => BigInt(v) : v => v;
 
   stats[0] = convert(8675309); // dev