message: Use new format for tasks.json
diff: "tasks": [
  {
  "taskName": "test",
  - "args": ["run", "test:watch"],
  + "args": [
  + "run",
  + "test:watch"
  + ],
  "isTestCommand": true,
  "problemMatcher": {
  - "fileLocation": ["relative", "${workspaceRoot}/src"],
  - "watchedTaskBeginsRegExp": "\\[npm\\] INFO Spawning\\.\\.\\.",
  - "watchedTaskEndsRegExp": "\\[npm\\] (ERROR Exited with code \\d+|SUCCESS Exited cleanly|INFO Killed with SIGTERM)",
  + "fileLocation": [
  + "relative",
  + "${workspaceRoot}/src"
  + ],
  + "watching": {
  + "beginsPattern": "\\[npm\\] INFO Spawning\\.\\.\\.",
  + "endsPattern": "\\[npm\\] (ERROR Exited with code \\d+|SUCCESS Exited cleanly|INFO Killed with SIGTERM)"
  + },
  "pattern": [
  {
  "regexp": "^ (\\d+)\\) ((\\w+).*)",
  }
  ]
  },
  - "isWatching": true
  + "isBackground": true
  }
  ]
  }
  