chore: lock react version to 15.6.2

Author: chrisbreiding

package.json

@@ -27,7 +27,7 @@
   ],
   "dependencies": {
     "popper.js": "^1.12.9",
-    "prop-types": "^15.5.10"
+    "prop-types": "15.6.0"
   },
   "devDependencies": {
     "@cypress/releaser": "0.1.12",
@@ -41,9 +41,9 @@
     "eslint-plugin-react": "^7.5.1",
     "jsdom": "^9.5.0",
     "lodash": "^4.0.0",
-    "react": "15.3.2",
-    "react-addons-test-utils": "15.3.2",
-    "react-dom": "15.3.2",
+    "react": "15.6.2",
+    "react-addons-test-utils": "15.6.2",
+    "react-dom": "15.6.2",
     "sinon": "^1.17.6",
     "sinon-chai": "^2.8.0",
     "zunder": "^4.1.1"