fix(fix React dependency):

matteoterrinoni · matteoterrinoni · commit a698c8f06021 · 2018-06-19T10:47:56.000+02:00
diff --git a/src/index.tsx b/src/index.tsx
@@ -1,4 +1,4 @@
-import React from 'React'
+import React from 'react'
 
 import {
 	merge, deepCopy
