Breaking changes
* `nichtparasoup config --check`'s "duplicate image crawler" is no longer a Warning but an Error.
* renamed `nichtparasoup.testing.config.ConfigFilesTest` to `ConfigFileTest` - without an "s".
Changes
* `nichtparasoup config --check` now does a probe crawl.
* class `ImageCrawlerInfo` lost support for positional arguments, supports keyword-arguments only - prepare future extensibility.
* class `Image` lost support for positional arguments, supports keyword-arguments only - prepare future extensibility.
Added
* added image crawler for [pr0gramm](https://pr0gramm.com) - Read the [docs](./docs/imagecrawlers/pr0gramm.md).
* added additional test function: `nichtparasoup.testing.config.ConfigFileTest.probe()`.