Issue with Czech locale

[dreamscached]

Hi! I'm using yargs in my personal project and I seem to have issues with it when I run ./index.js --help:

SyntaxError: syntax error in /home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/yargs/locales/cs.json
    at JSON.parse (<anonymous>)
    at Y18N._readLocaleFile (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/y18n/build/index.cjs:141:37)
    at Y18N.__ (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/y18n/build/index.cjs:30:18)
    at Object.P.n.help (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/yargs/build/index.cjs:1:16520)
    at Object.P.n.showHelp (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/yargs/build/index.cjs:1:20126)
    at Xt.showHelp (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/yargs/build/index.cjs:1:42577)
    at Xt.[runYargsParserAndExecuteCommands] (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/yargs/build/index.cjs:1:58654)
    at Xt.parse (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/yargs/build/index.cjs:1:40011)
    at Xt.parseSync (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/node_modules/yargs/build/index.cjs:1:40511)
    at Object.<anonymous> (/home/dreamscached/Dokumenty/Vývoj/Projekty/dreamscached/rexport/index.js:9:6)

Edit: seemingly there is a PR that addresses that: #2242

[panther7]

Maybe add JSON validation for locales to tests.

[davidslaby]

The same issue

[bcoe]

Apologies for the bad release, and taking so long to land.