fix: Invalid peer dependency for react-dom

closes #327

Author: tommoor

package.json

@@ -47,7 +47,7 @@
   },
   "peerDependencies": {
     "react": "^16.0.0 || ^17.0.0",
-    "react-dom": "^16.0.0 ^17.0.0",
+    "react-dom": "^16.0.0 || ^17.0.0",
     "styled-components": "^5.0.0"
   },
   "devDependencies": {
@@ -107,4 +107,4 @@
     "url": "https://github.com/outline/rich-markdown-editor/issues"
   },
   "homepage": "https://github.com/outline/rich-markdown-editor#readme"
-}
+}