0.4.0

Added

• Changing post's language via bulk edit (#66).
• Filter for posts without language or unknown languages in the back-office post list for translatable post types (#69).
• Filter ubb_translatable_routes for routes outside of post/term/archives that the user wants to be available in other languages when using the method LangInterface::translate_current_url() (#72).

Changed

• Use transients in LangInterface to optimize fetching language and translations (#55, #60).
• Improved language interface in post edit for setting language for posts without language or with an unknown language (#69).

Fixed

• Broken translation linking on a new post in Gutenberg (#56).
• Language metabox being enqueued for non-translatable post types (#57).
• SQL bug in LangInterface::get_terms_for_source (#68).