Fixed deprecated use of new Buffer in tests

- the recommended replacement is `Buffer.alloc`, which is compatible with
  Node 10 - 17

Author: daniellockyer

test/issue-108.test.js

@@ -17,7 +17,7 @@ describe('buffer', function() {
                 throw err;
             });
 
-            var buff = new Buffer(2);
+            var buff = Buffer.alloc(2);
             stmt.run(buff);
             stmt.finalize();
         });