title: RUST cargo run task with arguments in vscode
body: <p>Is there a way to specify arguments to a RUST cargo command running as VS CODE task?
  Or should I be trying this as an NPM script? (of course, this is RUST, so I am using CARGO and npm, creating a package.json would be odd).</p>
  
  <p>The Build task works fine:</p>
  
  <pre><code>"version": "2.0.0",
  "tasks": [
      {
        "type": "cargo",
        "subcommand": "build",
        "problemMatcher": [
          "$rustc"
        ],
        "group": {
          "kind": "build",
          "isDefault": true
        }
  },
  </code></pre>
  
  <p>But I have no idea where to put the arguments since I want it to be</p>
  
  <pre><code>$cargo run [filename]
  
  </code></pre>
  
  <pre><code>{
    "type": "cargo",
    "subcommand": "run",
    "problemMatcher": [
      "$rustc"
     ]
  }
  </code></pre>