Vapor: 4.30.0 Release

This patch was authored and released by @JaapWijnen.

• DotEnv files can be loaded before initializing application
• Reduces boilerplate code when you want to bootstrap logging with environment variables loaded from a .env file
• Can be loaded in similar fashion as Application or provide absolute and relative .env file locations using DotEnvFile.load(path: ...)

let env = try Environment.detect()
DotEnvFile.load(for: env)
LoggingSystem.bootstrap { label in 
   // use environment variables here (before application is initialized)
}
let app = Application(env)