message: chore: use Squash and merge to merge PRs
diff: # Contributing Guide
  +## For Contributors
  +
  Thank you for your contribution!
  -## Setup
  +### Setup
  This repository is a monorepo using Lerna and Yarn Workspaces.
  @@ -11,14 +13,7 @@ This repository is a monorepo using Lerna and Yarn Workspaces.
  % yarn install
  ```
  -## Development
  -
  -We use conventional commits for our commit messages.
  -So if you are not familiar with it, please see the following resource.
  -
  -https://www.conventionalcommits.org/
  -
  -## Test
  +### Test
  ```sh
  % cd js-sdk
  @@ -26,7 +21,13 @@ https://www.conventionalcommits.org/
  % yarn lint
  ```
  -## Release (for maintainers)
  +## For Maintainers
  +
  +### Merge
  +
  +After you have approved a PR, please merge the PR using **Squash and merge** with [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) format.
  +
  +### Release
  ```
  % cd js-sdk
  