v5.1.0

What's Changed

• BUGFIX: _text_api() - update request payload (api blocks requests)
• Add mypy type-checking, recode to comply by @deedy5 in #193
• maps(): raise exception if coordinates are not found
• DDGS: make _loop class variable
• AsyncDDGS: make _executor class variable
• utils.py: _is_500_in_url() - decorate with lru_cache
• AsyncDDGS.init(): add 'self._parser' for reuse lxml HtmlParser within class instance

Full Changelog: v5.0...v5.1.0