chore: add drivers as peer deps

Author: RomainLanz

package.json

@@ -56,6 +56,18 @@
     "tsup": "^8.5.1",
     "typescript": "^5.9.2"
   },
+  "peerDependencies": {
+    "ioredis": "^5.0.0",
+    "pg": "^8.0.0"
+  },
+  "peerDependenciesMeta": {
+    "ioredis": {
+      "optional": true
+    },
+    "knex": {
+      "optional": true
+    }
+  },
   "author": "Romain Lanz <romain.lanz@pm.me>",
   "license": "MIT",
   "keywords": [