chore(deps): bump wpackagist-plugin/wp-mail-smtp from 4.1.1 to 4.2.0

Bumps wpackagist-plugin/wp-mail-smtp from 4.1.1 to 4.2.0.

---
updated-dependencies:
- dependency-name: wpackagist-plugin/wp-mail-smtp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]