message: build(compiler-cli): remove unused dependency (`shelljs`)
  Since, `compiler-cli` is no longer depending on `shelljs` for
  production code. (We still use it in tests and infrastructure/tooling.)
  Incidentally, this should also help with
  PR Close
diff: "convert-source-map": "^1.5.1",
  "dependency-graph": "^0.7.2",
  "magic-string": "^0.25.0",
  - "shelljs": "^0.8.1",
  "source-map": "^0.6.1",
  "tslib": "^1.9.0",
  "yargs": "13.1.0"
  