* Update eslint settings * Update 2021 files * Update other files
* Update paths to no longer use bg/, fg/, or mixed/ * Only allow modal-jquery.js to use jQuery
* Update copyright year * Remove redundant Author info
* Add script to build library files * Add built parse5 library * Add new SimpleDOMParser which uses parse5 * Update license info * Update MV3 build to use the new SimpleDOMParser * Update file exclusions * Hide/clarify license info for MV2 builds