Update dependency @gatsbyjs/reach-router to v2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@gatsbyjs/reach-router	1.3.9 -> 2.0.1

---

Release Notes

gatsbyjs/reach-router (@​gatsbyjs/reach-router)

v2.0.1

Compare Source

• Don't use postinstall script for husky install as that impact end users in some cases

From PR #​11

v2.0.0

Compare Source

• Don't pass navigate through context (as it's a function)
• Convert everything to function components
• Convert everything to hooks
• Optionally use createServerContext for context
• Build files with microbundle
• Use @testing-library/react for tests

From PR #​4

---

Configuration

📅 Schedule: Branch creation - Monday through Friday ( * * * * 1-5 ) (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.