fix(package): update react-popper to version 2.2.3

Closes #47

Author: greenkeeper[bot]

package.json

@@ -10,7 +10,7 @@
     "debounce": "^1.0.2",
     "emotion": "^10.0.14",
     "immutable": "~3.8.2",
-    "react-popper": "^1.0.0",
+    "react-popper": "^2.2.3",
     "react-virtualized": "^9.18.5",
     "uuid": "^3.3.2"
   },