chore(deps): update actions/setup-node action to v2.3.0

This MR contains the following updates:

Package	Type	Update	Change
actions/setup-node	action	minor	v2.2.0 -> v2.3.0

---

Release Notes

actions/setup-node

v2.3.0

Compare Source

This release introduces dependency caching support for the pnpm package manager (#​278).

Caching pnpm dependencies:

### This workflow uses actions that are not certified by GitHub.
### They are provided by a third-party and are governed by
### separate terms of service, privacy policy, and support
### documentation.

steps:
- uses: actions/checkout@v2
- uses: pnpm/action-setup@646cdf48217256a3d0b80361c5a50727664284f2
  with:
    version: 6.10.0
- uses: actions/setup-node@v2
  with:
    node-version: '14'
    cache: 'pnpm'
- run: pnpm install
- run: pnpm test

NOTE: pnpm caching support requires pnpm version >= 6.10.0

---

Configuration

📅 Schedule: At any time (no schedule defined).

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

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

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

---

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

---

This MR has been generated by Renovate Bot.