Bump node-fetch, @reach/router and gatsby-telemetry

Bumps [node-fetch](https://github.com/node-fetch/node-fetch), [@reach/router](https://github.com/reach/router) and [gatsby-telemetry](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-telemetry). These dependencies needed to be updated together.

Updates `node-fetch` from 2.6.0 to 2.7.0
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@v2.6.0...v2.7.0)

Updates `@reach/router` from 1.2.1 to 1.3.4
- [Changelog](https://github.com/reach/router/blob/master/CHANGELOG.md)
- [Commits](https://github.com/reach/router/commits)

Updates `gatsby-telemetry` from 1.1.47 to 1.10.2
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-telemetry/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-telemetry@1.10.2/packages/gatsby-telemetry)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: indirect
- dependency-name: "@reach/router"
  dependency-type: indirect
- dependency-name: gatsby-telemetry
  dependency-type: indirect
...

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