Handle malformed redirect data in some versions

[Mr0grog]

I ran across an old Versionista version today that has malformed redirect data (https://api.monitoring.envirodatagov.org/api/v0/versions/69ff9ffe-0482-49fc-b5f6-f3d3b9906dcd), it turns out that breaks the UI. See this comparison view for an example: https://monitoring.envirodatagov.org/page/447f59e4-1bf8-4c63-918e-43030acc59b6/69ff9ffe-0482-49fc-b5f6-f3d3b9906dcd..cd686ddd-05ba-4b94-ac96-b878e5e65383

The problem here is that this version has bad data in its redirect history:

{
    "uuid": "69ff9ffe-0482-49fc-b5f6-f3d3b9906dcd",
    "source_metadata": {
        "redirects": [
            "2016-01-01T00:00:00.000Z"
        ],
        // ...
    },
    // ...
}

The PageUrlDetails component sees that there are redirects and attempts to show a list of them with UrlHistoryList, which errors when it calls parseUrlForDiff() on the invalid URL.

We should probably validate that the history is actually a list of URLs first and either only show it if all the entries are valid or just filter out the invalid entries. Either is probably OK.