v8.0.0

[evanshortiss]

Preparing for a v8.0.0 release.

I will push to the typescript-refactor branch in the next few days with a working codebase that handles some or all of these items:

• Rewrite module in TypeScript
• Support for non Node.js/React environments Don't default export from(process.env) for environments that don't have process #155
• Deno support Deno Support #153
• Support a description function Add description() function #142
• Add option to make all variables required by default Configure default behavior / Support dotenv-defaults #147
• Update documentation
• Create a migration guide for API changes from v7 to v8
• Support both ESM and CJS (looks like nearform/lyra is a good example of this)
• Add docs for Next.js/React usage (issue Client side. #162)
• Add docs for Vite

[evanshortiss]

Notes:

• Removed ability to override built-in accessors
• Set minimum engine version to Node.js 12.x
• Changed extension API. Now requires invoking the extension via usingExtension(fn)
• The accessors property is no longer attached to EnvInstance (the return value of from())
• Removed the default exported "convenience" logger. Developers now must create a logger using the exported function
• Changed the built in logger to perform a production mode check using a boolean instead of a "prod" string