Fix Node.js version compatibility for @solana/codecs-numbers dependency

Co-authored-by: 0xrinegade <[email protected]>

Author: Copilot

.github/workflows/build-android.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Setup Node.js
       uses: actions/setup-node@v4
       with:
-        node-version: '18.20.0'
+        node-version: '20.x'
         cache: 'yarn'
 
     - name: Cache Node modules

.nvmrc

@@ -1 +1 @@
-v18.20.0
+v20.18.0

package.json

@@ -140,6 +140,9 @@
     "react-scripts": "5.0.1",
     "typescript": "^4.9.5"
   },
+  "engines": {
+    "node": ">=20.18.0"
+  },
   "resolutions": {
     "elliptic": "6.6.0"
   }