fix: add react as a peer dependency (#33)

* fix: add react as a peer dependency

* chore(deps): use react >=15 instead of *

Author: amcgee

package.json

@@ -27,7 +27,8 @@
     "jsdoc-to-markdown": "^5.0.0"
   },
   "peerDependencies": {
-    "prop-types": "^15"
+    "prop-types": "^15",
+    "react": ">=15"
   },
   "files": [
     "build"