fix(deps): update dependency @types/react-dom to v17.0.3 (#54)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [@types/react-dom](https://togithub.com/DefinitelyTyped/DefinitelyTyped) | [`17.0.2` -> `17.0.3`](https://renovatebot.com/diffs/npm/@types%2freact-dom/17.0.2/17.0.3) | [![age](https://badges.renovateapi.com/packages/npm/@types%2freact-dom/17.0.3/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/npm/@types%2freact-dom/17.0.3/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/npm/@types%2freact-dom/17.0.3/compatibility-slim/17.0.2)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/npm/@types%2freact-dom/17.0.3/confidence-slim/17.0.2)](https://docs.renovatebot.com/merge-confidence/) |

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Author: kodiakhq[bot]

template/cra-subgraph/package.json

@@ -8,7 +8,7 @@
     "@types/jest": "26.0.21",
     "@types/node": "12.20.6",
     "@types/react": "17.0.3",
-    "@types/react-dom": "17.0.2",
+    "@types/react-dom": "17.0.3",
     "apollo-cache-inmemory": "1.6.6",
     "apollo-client": "2.6.10",
     "apollo-link": "1.2.14",