Add engines field to package.json (#3433)

packages/types/package.json

@@ -8,6 +8,9 @@
     "./detectPackage.js",
     "./detectPackage.cjs"
   ],
+  "engines": {
+    "node": ">=14.0.0"
+  },
   "author": "Jaco Greeff <jacogr@gmail.com>",
   "maintainers": [],
   "contributors": [],
@@ -18,13 +21,13 @@
   "dependencies": {
     "@babel/runtime": "^7.13.17",
     "@polkadot/metadata": "4.6.3-10",
-    "@polkadot/util": "^6.2.2-7",
-    "@polkadot/util-crypto": "^6.2.2-7",
-    "@polkadot/x-rxjs": "^6.2.2-7",
+    "@polkadot/util": "^6.2.2-8",
+    "@polkadot/util-crypto": "^6.2.2-8",
+    "@polkadot/x-rxjs": "^6.2.2-8",
     "@types/bn.js": "^4.11.6",
     "bn.js": "^4.11.9"
   },
   "devDependencies": {
-    "@polkadot/keyring": "^6.2.2-7"
+    "@polkadot/keyring": "^6.2.2-8"
   }
 }