Enable the ESLint `default-case-last` rule, and tweak the existing `use-isnan` rule
Enable the ESLint `default-case-last` rule, and tweak the existing `use-isnan` rule

These changes were made possible by ESLint version 7, and neither of these rules required any code changes.

Please find additional details about the ESLint rules at https://eslint.org/docs/rules/default-case-last and https://eslint.org/docs/rules/use-isnan

xavier114fch/pdf.js,showpad/mozilla-pdf.js,Snuffleupagus/pdf.js,macroplant/pdf.js,Shoobx/pdf.js,Shoobx/pdf.js,macroplant/pdf.js,caremerge/pdf.js,mozilla/pdf.js,nawawi/pdf.js,timvandermeij/pdf.js,Snuffleupagus/pdf.js,macroplant/pdf.js,timvandermeij/pdf.js,mozilla/pdf.js,mozilla/pdf.js,nawawi/pdf.js,caremerge/pdf.js,Shoobx/pdf.js,timvandermeij/pdf.js,showpad/mozilla-pdf.js,Snuffleupagus/pdf.js,xavier114fch/pdf.js,nawawi/pdf.js,showpad/mozilla-pdf.js