Update non-jQuery JavaScript browser libraries #142
Description
The main website uses only jQuery but Exhibitions uses Masonry, LightGallery, two LightGallery plugins (Video and Zoom), and an ImagesLoaded jQuery plugin. We should update these regularly but it's hard to remember since it's not as automated as npm updates.
These files are referenced in libraries/exhibitions/templates/exhibit_page.html in the extra_js block.