Fixes

• 🐛 Fix type conversion for List and Tuple and their internal types. PR #143 by @hellowhistler.
• 🐛 Fix context_settings for a Typer app with a single command. PR #210 by @daddycocoaman.

Docs

• 📝 Clarify testing documentation about checking stderr. PR #335 by @cgabard.
• ✏ Fix typo in docs for CLI Option autocompletion. PR #288 by @graue70.
• 🎨 Fix header format for "Standard Input" in docs/tutorial/printing.md. PR #386 by @briancohan.
• ✏ Fix typo in docs/tutorial/terminating.md. PR #382 by @kianmeng.
• ✏ Fix syntax typo in docs/tutorial/package.md. PR #333 by @ryanstreur.
• ✏ Fix typo, duplicated word in docs/tutorial/options/required.md.. PR #316 by @michaelriri.
• ✏ Fix minor typo in index.md. PR #274 by @RmStorm.
• ✏ Fix double "and" typo in first-steps tutorial. PR #225 by @softwarebloat.
• 🎨 Fix format in docs explaining datetime parameter type. PR #220 by @DiegoPiloni.

Internal

• ⬆ [pre-commit.ci] pre-commit autoupdate. PR #404 by @pre-commit-ci[bot].
• 👷 Fix Material for MkDocs install in CI. PR #395 by @tiangolo.
• 👷 Add pre-commit CI config. PR #394 by @tiangolo.
• 👷 Clear MkDocs Insiders cache. PR #393 by @tiangolo.
• 🔧 Add pre-commit config and formatting. PR #392 by @tiangolo.
• 👷 Disable installing MkDocs Insiders in forks. PR #391 by @tiangolo.
• ⬆️ Upgrade Codecov GitHub Action. PR #383 by @tiangolo.