Update nan to support node 22

Author: dthornley

.gitignore

@@ -0,0 +1,2 @@
+build
+node_modules

package.json

@@ -1,11 +1,11 @@
 {
   "name": "@picturae/mmmagic",
-  "version": "0.5.3",
+  "version": "0.5.4",
   "author": "Brian White <mscdex@mscdex.net>",
   "description": "An async libmagic binding for node.js for detecting content types by data inspection",
   "main": "./lib/index",
   "dependencies": {
-    "nan": "^2.17.0"
+    "nan": "^2.20.0"
   },
   "scripts": {
     "install": "node-gyp rebuild",