Ignore dependency patches

[dmsmidt]

this commit fixes #112

[dmsmidt]

Note that this only works without the intermediate level (below: drupal/lightning).
I think that abstraction is not really needed and keeping the structure similar to "patches" makes it easier to use.

Before:

"patches-ignore": {
      "drupal/lightning": {
        "drupal/panelizer": {
          "This patch has known conflicts with our Quick Edit integration": "https://www.drupal.org/files/issues/2664682-49.patch"
        }
      }
    }
  }

After:

"patches-ignore": {
  "drupal/panelizer": {
    "This patch has known conflicts with our Quick Edit integration": "https://www.drupal.org/files/issues/2664682-49.patch"
    }
  }
}

Note, no cleanup of the code mentioned in #112 is done.

[dmsmidt]

Actually this change only sees to work for tag 1.6.0, master doesn't apply patches anyhow.

[dmsmidt]

That patches didn't apply is fixed being here in #108. Closing this since we want a PR for master.