excludedPaths does not work expectedly on Windows

[kakkun61]

Where there is an elm-analyse.json like following, elm-analyse includes files like elm-mdc\src\Internal\Button\Model.elm on Windows.

{
  "excludedPaths": [
      "elm-mdc/src"
  ]
}

Although the following configuration works expectedly, this is inconvenient for Linux or macOS users.

{
  "excludedPaths": [
      "elm-mdc\\src"
  ]
}

I think that elm-mdc/src must match elm-mdc\src\foo\Bar.elm.