loosen react peer dependency

Author: jimmyn

package.json

@@ -72,7 +72,7 @@
   "peerDependencies": {
     "gatsby": "^2.2.0",
     "i18next": "^19.4.5",
-    "react": "^16.12.0",
+    "react": "^16.x || ^17.x",
     "react-i18next": "^11.5.0"
   },
   "optionalDependencies": {