chore: Fix example dependency mistake (#1094)

For some reason Greenkeeper had us bump a dependency to a non-existing version.

Closes #1090

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- [x] Follows the commit message policy, appropriate for next version
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doc/examples/jest_react/package.json

@@ -18,7 +18,7 @@
     "babel-preset-es2015": "^6.24.1",
     "babel-preset-react": "^6.24.1",
     "enzyme": "^3.3.0",
-    "enzyme-adapter-react-16": "^1.5.0",
+    "enzyme-adapter-react-16": "^1.2.0",
     "jest": "^22.4.0",
     "jest-cli": "^23.0.1",
     "react": "^16.4.0",