Bump Node version (#411)

From Node 18 to Node 20.
Also uses the latest Solana version in CI.

Author: lorisleiva

.github/workflows/main.yml

@@ -8,9 +8,9 @@ on:
 env:
   # Among other things, opts out of Turborepo telemetry. See https://consoledonottrack.com/.
   DO_NOT_TRACK: '1'
-  NODE_VERSION: 18
+  NODE_VERSION: 20
   CODAMA_VERSION: 1.x
-  SOLANA_VERSION: 1.18.12
+  SOLANA_VERSION: 2.1.9
 
 jobs:
   lint:

package.json

@@ -37,7 +37,7 @@
         "zx": "^8.3.0"
     },
     "engines": {
-        "node": ">=18.0.0"
+        "node": ">=20.0.0"
     },
     "packageManager": "[email protected]",
     "prettier": "@solana/prettier-config-solana"