trafilatura-1.4.0

Impact on extraction and output format:

• better extraction (#233, #243 & #250 with @knit-bee, #246 with @mrienstra, #258)
• XML: preserve list type as attribute (#229)
• XML TEI: better conformity with @knit-bee (#238, #242, #253, #254)
• faster text cleaning and shorter code (#237 with @deedy5, #245)
• metadata: add language when detector is activated (#224)
• metadata: extend fallbacks and test coverage for json_metadata functions by @felipehertzer (#235)
• TXT: change markdown formatting of headers by @LaundroMat (#257)

Smaller changes in convenience functions:

• add function to clear caches (#219)
• CLI: change exit code if download fails (#223)
• settings: use "\n" for multiple user agents by @k-sareen (#241)

Updates:

• docs updated (and #244 by @dsgibbons)
• package dependencies updated

Full Changelog: v1.3.0...v1.4.0