Bump babel-preset-gatsby-package from 2.14.0 to 2.17.0 (#314)

Bumps [babel-preset-gatsby-package](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/babel-preset-gatsby-package) from 2.14.0 to 2.17.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/babel-preset-gatsby-package/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/babel-preset-gatsby-package)

---
updated-dependencies:
- dependency-name: babel-preset-gatsby-package
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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