chore: Add react as root dependency

This silences the yarn warning for missing peer dependency for
`@nighttrax/components`. This is actually a bug in yarn:
yarnpkg/yarn#5810. I don't particularly like
the workaround, but better than a noisy warning, I guess?

Fixes #60.

package.json

@@ -19,6 +19,7 @@
  "eslint": "~7.25.0",
  "eslint-plugin-import": "~2.22.1",
  "lerna": "~4.0.0",
+ "react": "~17.0.0",
  "typescript": "~4.2.0"
  }
 }