Bump actions/checkout from v1 to v2.3.4

[dependabot]

⚠️ Dependabot is rebasing this PR ⚠️

If you make any changes to it yourself then they will take precedence over the rebase.

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Bumps actions/checkout from v1 to v2.3.4.

Release notes

Sourced from actions/checkout's releases.

v2.3.4

• Add missing awaits
• Swap to Environment Files

Changelog

Sourced from actions/checkout's changelog.

Changelog

v2.3.1

• Fix default branch resolution for .wiki and when using SSH

v2.3.0

• Fallback to the default branch

v2.2.0

• Fetch all history for all tags and branches when fetch-depth=0

v2.1.1

• Changes to support GHES (here and here)

v2.1.0

• Group output
• Changes to support GHES alpha release
• Persist core.sshCommand for submodules
• Add support ssh
• Convert submodule SSH URL to HTTPS, when not using SSH
• Add submodule support
• Follow proxy settings
• Fix ref for pr closed event when a pr is merged
• Fix issue checking detached when git less than 2.22

v2.0.0

• Do not pass cred on command line
• Add input persist-credentials
• Fallback to REST API to download repo

v2 (beta)

• Improved fetch performance
  • The default behavior now fetches only the SHA being checked-out
• Script authenticated git commands
  • Persists with.token in the local git config
  • Enables your scripts to run authenticated git commands
  • Post-job cleanup removes the token
  • Coming soon: Opt out by setting with.persist-credentials to false
• Creates a local branch
  • No longer detached HEAD when checking out a branch
  • A local branch is created with the corresponding upstream branch set
• Improved layout

... (truncated)

Commits

• 5a4ac90 Add missing awaits (#379)
• c952173 Swap to Environment Files (#360)
• a81bbbf Remove unneeded commit information from build logs (#345)
• 21dc310 Add Licensed To Help Verify Prod Licenses (#326)
• be6c44d Revert "Delete licenses.txt"
• dac8cc7 Delete licenses.txt
• 2036a08 Add Third Party License Information to Dist Files (#320)
• 592cf69 Update README.md
• a4b69b4 Update README.md
• 1433f62 update default branch (#305)
• Additional commits viewable in compare view

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[dependabot]

Dependabot tried to add @ktr0731 as a reviewer to this PR, but received the following error from GitHub:

POST https://api.github.com/repos/kokizzu/evans/pulls/7/requested_reviewers: 422 - Reviews may only be requested from collaborators. One or more of the users or teams you specified is not a collaborator of the kokizzu/evans repository. // See: https://docs.github.com/rest/reference/pulls#request-reviewers-for-a-pull-request

[dependabot]

The following labels could not be found: update.