Update dotenv requirement from ^7.0.0 to ^8.0.0 (#32)

Updates the requirements on [dotenv](https://github.com/motdotla/dotenv) to permit the latest version.
- [Release notes](https://github.com/motdotla/dotenv/releases)
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](https://github.com/motdotla/dotenv/compare/v7.0.0...v8.0.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -38,7 +38,7 @@
 		"custom-translate": "^2.2.8",
 		"discord.js": "github:discordjs/discord.js",
 		"discord.js-commando": "github:discordjs/Commando",
-		"dotenv": "^7.0.0",
+		"dotenv": "^8.0.0",
 		"erlpack": "github:discordapp/erlpack",
 		"mathjs": "^5.9.0",
 		"moment": "^2.24.0",