v0.12
- dropped Python 2 support
- tested with Python 3.8, 3.9, Scrapy 2.4+, add official support
- option to explicitly pass crawl arguments for spider by "crawl_args" argument to GET and POST endpoints
- bug fix when API was hanging on bytes returned from user spiders
- removed not needed and outdated dependencies such as demjson, six
- documentation lifting (readme.md page in pip and github)