title: VSCODE Task Typescript TS5042 Build: Option 'project' cannot be mixed with source files on a command line
body: <p>I am running a task defined in tasks.json using vscode to compile the typescripts files from a folder. But I kept getting the error "Typescript TS5042  Build: Option 'project' cannot be mixed with source files on a command line".</p>
  
  <p>When I run this command from the command line(powershell) then it works fine!</p>
  
  <p>My tasks.json</p>
  
  <pre><code>{
      "version": "0.1.0",
      "command": "tsc",
      "isShellCommand": true,
      "args": [],
      "tasks": [
          {
              "taskName": "CompileApp",
              "args": [
                  "--p", "app/"
              ],
              "isBuildCommand": true,
              "problemMatcher": "$tsc"
          }
      ]
  }
  </code></pre>