upgrade the [vlang-test-runner](https://github.com/exercism/vlang-test-runner) to v2 as described by [the docs](https://exercism.org/docs/building/tooling/test-runners/interface): > `2`: For tracks which test runner can output individual test information. Minimal required version for tracks with Concept Exercises.
upgrade the vlang-test-runner to v2 as described by the docs: