Updating to envalid v8 and road to nestjs-envalid v3

[simenandre]

A few excellent features have been added to envalid for the upcoming v8 release, so this feels like an excellent time to update.
Our trunk is soon updated to envalid v8 beta, but we will hold back from releasing that until things stabilize (aka officially released)

What does this mean for you?

We will continue releasing updates if nest bumps to a new major version, which typically happens a few times a year.
But since there's no plan for when envalid releases v8, we will do a major bump in nestjs-envalid if nest releases a major version before envalid releases v8. That means we will be releasing using a beta release.

[simenandre]

I made a pre-release so you can test the new v3 out today!

yarn add nestjs-envalid@next envalid