fix(package): update react-dom to version 16.6.2

Closes #10

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
 	"dependencies": {
 		"prop-types": "^15.6.2",
 		"react": "16.6.2",
-		"react-dom": "16.5.0"
+		"react-dom": "16.6.2"
 	},
 	"devDependencies": {
 		"babel-cli": "^6.26.0",