Bump merge-deep from 3.0.2 to 3.0.3 in /examples/simple-counter

Bumps [merge-deep](https://github.com/jonschlinkert/merge-deep) from 3.0.2 to 3.0.3.
- [Release notes](https://github.com/jonschlinkert/merge-deep/releases)
- [Commits](jonschlinkert/merge-deep@3.0.2...3.0.3)

---
updated-dependencies:
- dependency-name: merge-deep
  dependency-type: indirect
...

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