Allow React 17 as peer dependency

Author: StorytellerCZ

package.json

@@ -133,8 +133,8 @@
         "webpack-dev-server": "^3.2.1"
     },
     "peerDependencies": {
-        "react": "^16.3.2",
-        "react-dom": "^16.3.3"
+        "react": "^16.3.2 || ^17.0.0",
+        "react-dom": "^16.3.3 || ^17.0.0"
     },
     "husky": {
         "hooks": {