deps: bump piscina + raise engine requirements >= 20.x

Signed-off-by: Tuan Anh Tran <me@tuananh.org>

Author: tuananh

package.json

@@ -7,7 +7,7 @@
     "main": "index.js",
     "typings": "index.d.ts",
     "engines": {
-        "node": ">= 16.0.0"
+        "node": ">= 20.x"
     },
     "scripts": {
         "test": "tape test/*.test.js",
@@ -70,6 +70,6 @@
         "xml2js": "^0.6.0"
     },
     "dependencies": {
-        "piscina": "^3.2.0"
+        "piscina": "^5.2.0"
     }
 }