Make config-loader return type `Config` (#5939)
Make config-loader return type `Config` (#5939)


svivian/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,Enigami/Pokemon-Showdown,svivian/Pokemon-Showdown,AustinXII/Pokemon-Showdown,Enigami/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,urkerab/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,svivian/Pokemon-Showdown,xfix/Pokemon-Showdown,xfix/Pokemon-Showdown,svivian/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,urkerab/Pokemon-Showdown,svivian/Pokemon-Showdown,AustinXII/Pokemon-Showdown,urkerab/Pokemon-Showdown,Zarel/Pokemon-Showdown,Enigami/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,xfix/Pokemon-Showdown,xfix/Pokemon-Showdown,xfix/Pokemon-Showdown,Zarel/Pokemon-Showdown,Enigami/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,Zarel/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,AustinXII/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown