message: [TypeScript] Add vscode task to run tslint on all files.
diff: "taskName": "Start Typescript Compiler (in watch mode)",
  "isBuildCommand": true,
  "args": ["node_modules/.bin/tsc --watch"],
  - "isWatching": true,
  + "isBackground": true,
  "problemMatcher": [
  "$tsc-watch"
  ]
  + },
  + {
  + "taskName": "TSLint: Lint all files",
  + "command": "yarn",
  + "args": ["lint"],
  + "problemMatcher": {
  + "owner": "tslint",
  + "fileLocation": [
  + "relative",
  + "${workspaceRoot}"
  + ],
  + "severity": "warning",
  + "pattern": {
  + "regexp": "^(\\S.*)\\[(\\d+), (\\d+)\\]:\\s+(.*)$",
  + "file": 1,
  + "line": 2,
  + "column": 3,
  + "message": 4
  + }
  + }
  }
  ]
  }
  