Use prop-types package (facebook#2029)

Timer · just-boris · commit 5940ccb187d6 · 2017-04-27T00:21:06.000+02:00
diff --git a/packages/react-scripts/fixtures/kitchensink/.template.dependencies.json b/packages/react-scripts/fixtures/kitchensink/.template.dependencies.json
@@ -7,7 +7,7 @@
     "chai": "3.5.0",
     "jsdom": "9.8.3",
     "mocha": "3.2.0",
-    "prop-types": "^15.5.8",
+    "prop-types": "15.5.6",
     "test-integrity": "1.0.0"
   }
 }
