build(deps): args 2.5.0, meta 1.14.0, at_commons 4.0.8, at_server_spec 5.0.1

[cpswan]

Dependabot still fails to raise PRs for pub deps

- What I did

Bumped pubspec.yaml dependencies that should have been Dependabot PRs

- How I did it

Took updates from logs:

• https://github.com/atsign-foundation/at_server/network/updates/821450925
• https://github.com/atsign-foundation/at_server/network/updates/821431375

- How to verify it

Unit tests passed locally CI will run functional and end2end tests

- Description for the changelog