chore: remove support for node 14

Author: mojoaxel

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x, 20.x]
+        node-version: [16.x, 18.x, 20.x]
 
     steps:
     - uses: actions/checkout@v2

package.json

@@ -4,7 +4,7 @@
   "description": "merge multiple PDF documents, or parts of them, to a new PDF document",
   "type": "module",
   "engines": {
-    "node": ">=14"
+    "node": ">=16"
   },
   "main": "./index.js",
   "types": "./index.d.ts",