Our second release in the 2020 TeX Live cycle

This release requires TeX Live 2020 and synchronised CTAN packages not older than 1 April 2021.

User interface

Integrated langsci-affiliations, a new package to manage author-affiliation pairs. This package can be installed from CTAN on TeX Live 2020 and is now a dependency for langscibook. Please see this Wiki page and the package documentation for further details.
A compilation of monographs and edited volumes now automatically creates a bibliographical file langsci-current-book.bib, which contains the bibliographical information of the book. This also solves bug #79.
In text books, the boxes from langsci-tbls are now better embedded into the surrounding main text by adjusting the balanced skip before and after the boxes.
\hspaceThis is removed. It has the same effect as \hphanthom, and the latter should be used instead.
The class option collectionchapter is discontinued. Its functions are wholly provided by collection.
Added support for EAN13+2 ISBNs, i.e. multi-volume ISBNS. They have to be entered in the form \ISBNhardcover[+2 Addon]{ISBN-13}
Added a new command \restorebottom which resets the effects of \sloppybottom mid-document.

The citation recommendation on the imprint page is now produced with biblatex and the new cite command \fullciteImprint.
Restructured \includepaper; new auxiliary macro \lsCollectionMetadataToBibliography.