Release 2.0.0

💥 Breaking Change

• #658 Remove link cache (@Turbo87)
• #656 Raise minimum Node to v12 (@Turbo87)

🏠 Internal

• #678 Adjust @glimmer/tracking dependency to use semver (@Turbo87)
• #675 Use pnpm package manager (@Turbo87)
• #674 Release via CI (@Turbo87)
• #672 Update @types dependencies (@Turbo87)
• #668 Fix broken CSS selectors (@Turbo87)
• #667 Merge unnecessary duplicate imports (@Turbo87)
• #666 CI: Use yarn caching (@Turbo87)
• #662 Pin prettier to v2.2.1 (@Turbo87)
• #660 Use @babel/eslint-parser (@Turbo87)
• #625 Update dependency ember-qunit to v5 (@renovate[bot])
• #618 Fix CI issues (@Turbo87)