update tsconfig

package.json

@@ -2,7 +2,7 @@
   "name": "@push.rocks/smartsign",
   "version": "1.0.5",
   "private": false,
-  "description": "sign documents",
+  "description": "A library for signing PDF documents.",
   "main": "dist_ts/index.js",
   "typings": "dist_ts/index.d.ts",
   "type": "module",
@@ -50,5 +50,15 @@
     "cli.js",
     "npmextra.json",
     "readme.md"
+  ],
+  "keywords": [
+    "PDF signing",
+    "document signing",
+    "smartpdf",
+    "signpdf",
+    "typescript",
+    "node.js",
+    "certificate",
+    "P12 cert"
   ]
-}
+}