chore(package): update @types/react-dom to version 16.8.5

Closes #19

Author: greenkeeper[bot]

package.json

@@ -14,7 +14,7 @@
     "@types/enzyme": "^2.7.6",
     "@types/jest": "^19.2.2",
     "@types/react": "^15.0.0",
-    "@types/react-dom": "^0.14.23",
+    "@types/react-dom": "^16.8.5",
     "babel-jest": "^19.0.0",
     "babel-preset-es2015": "^6.24.0",
     "babel-preset-react": "^6.23.0",