Revert peer dependencies update

Author: przemyslawzalewski

package.json

@@ -23,8 +23,8 @@
   "browser": "dist/react-swipeable-list.umd.js",
   "peerDependencies": {
     "prop-types": "^15.7.2",
-    "react": "^16.13.0",
-    "react-dom": "^16.13.0"
+    "react": "^16.12.0",
+    "react-dom": "^16.12.0"
   },
   "devDependencies": {
     "@babel/core": "7.8.7",