CI Maintenance

[syoon2]

This PR adds maintenance patches to GitHub Action workflows. This includes:

• Version bump for actions/checkout from v2 (PR workflow) / v3 (master workflow) to v4 (refs: Deprecation Warning Output from GitHub Actions actions/checkout#959 (comment), Update default runtime to node20 actions/checkout#1436)
• Version bump for actions/setup-java from v2 (PR workflow) / v3 (master workflow) to v4 (refs: Update Default runtime to node16 actions/setup-java#290, Upgrade Node to v20 actions/setup-java#558)
• Changing actions/setup-java to use Eclipse Temurin build of OpenJDK (was using Azul Zulu OpenJDK)
  Unlike other distributions of OpenJDK, Temurin builds are cached in GH-hosted runners.
• Replacing actions/cache for Maven caching with built-in cache implementation in actions/setup-java
• Version bump for JamesIves/github-pages-deploy-action from 4.1.4 to v4.5.0
• Adding Dependabot config to automate version updates

---

• I read and understood https://github.com/jgrapht/jgrapht/wiki/Become-a-Contributor
• I read and understood https://github.com/jgrapht/jgrapht/wiki/How-to-make-your-first-%28code%29-contribution
• I added unit tests (not applicable)
• I added documentation (not applicable)
• I followed the Coding and Style Conventions
• I have not modified HISTORY.md or CONTRIBUTORS.md
• I ensured that the git commit message is a good one

[syoon2]

Range-diff:

-:  ---------- > 1:  b92c214e1c Fix CRLF/LF Consistency (#1166)
-:  ---------- > 2:  f1c32a530a Credits for last merge.
-:  ---------- > 3:  e625da9351 JUnit 5 Migration (#1163)
-:  ---------- > 4:  9c98ae8a2d Credits for last merge.
1:  a0f8b7b282 = 5:  d9bc9d2d78 Update GitHub Action workflows
2:  a8171ef173 = 6:  d3d9b3ec87 Setup Dependabot

@jsichi Mind if I ask for your review?

[jsichi]

Thanks, I will just go ahead and merge this and see what happens, since it seems like CI hasn't been running on master for a while anyway, only on PR branches?

[jsichi]

(Correction, CI has been running on master correctly; my mistake.)

[jsichi]

After merging to master, CI is now failing with "Error: Dependencies lock file is not found in /home/runner/work/jgrapht/jgrapht. Supported file patterns: package-lock.json,npm-shrinkwrap.json,yarn.lock"

See the log here:

https://github.com/jgrapht/jgrapht/actions/runs/7374477613/job/20064905918

[syoon2]

Hmm, ouch. Will submit a patch for the regression in the next hour or two.

Edit: See #1171

[syoon2]

@jsichi A side note: Dependabot needs to be manually enabled (because Dependabot is disabled by default on forked repositories) in https://github.com/jgrapht/jgrapht/network/updates for it to automatically create dependency update PRs.