Move data.table to Imports

[PascalCrepey]

Fixes #34

[Copilot]

Pull Request Overview

This PR tidies up package dependencies by moving ggraph into the Imports section of the DESCRIPTION file and removes an unused Depends entry. It also upgrades the GitHub Actions artifact upload action to v4 and parameterizes the artifact name.

• Moved ggraph from Depends to Imports in DESCRIPTION
• Bumped actions/upload-artifact from v3 to v4 and updated artifact naming in test-coverage workflow

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
DESCRIPTION	Added ggraph to Imports list; removed the empty Depends: block
.github/workflows/test-coverage.yaml	Upgraded upload-artifact action to v4; parameterized artifact name

Comments suppressed due to low confidence (1)

.github/workflows/test-coverage.yaml:49

• The artifact name uses runner.temp, which is a full filesystem path and may include invalid characters (e.g., slashes). Consider using a safer identifier, such as github.run_id or {{ github.run_number }}, to avoid naming issues.

          name: coverage-test-failures-${{ runner.temp }}

[MichaelChirico]

Excellent, thank you!