vapor/vapor 4.34.0

Reuse the application's event loop group and thread pool when loading .env files

on GitHub

This patch was authored and released by @siemensikkema.

• Prevents a separate EventLoopGroup from being created unnecessarily for loading .env files.
• Deprecates overloads for DotEnvFile.load in favor of version that accept a NonBlockingFileIO so existing resources can be reused.
• Prevents multiple EventLoopGroups from being created when calling the load methods that take an Environment when provided without a shared EventLoopGroupProvider.