build(deps): bump ep_plugin_helpers from 0.6.2 to 0.6.7

Bumps [ep_plugin_helpers](https://github.com/ether/ep_plugin_helpers) from 0.6.2 to 0.6.7.
- [Commits](ether/ep_plugin_helpers@v0.6.2...v0.6.7)

---
updated-dependencies:
- dependency-name: ep_plugin_helpers
  dependency-version: 0.6.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]