milestone v1.1.0 or v1.0.1

[sio4]

Starting with #2306, stabilizing the Buffalo core library is almost done. Now time to clean up the Buffalo core library itself. The remaining issues to be (hopefully) addressed by this release are as follows:

• make the current version v1 and configure branch structure #2306
• Application singleton is not really a singleton. #1653
  • App is not a singleton but app of scaffolded app should be the only root instance  cli#228
  • applied sync.Once to make 'app' to be the only root App cli#229
  • added two new functions: AddGlobal() and ReplaceBlock() genny#51
• [Bug] buffalo grenerate resource wrong template path #1769
• process: preparing go1.18 support #2264
• update function description for render.Download() to clarify the usage of the function #2287
• HTTP response code, err returned by request handlers, and middlewares #2300
  • made request logger the last middleware #2334
• app.ServeFiles should always be accessed last, regardless of when/where it's defined #1206

https://github.com/gobuffalo/buffalo/milestone/77