Document Node version support / add a warning to tsdx create

Current Behavior

If you’re on Node 8 you get errors when trying to run tsdx create, but the reason for the failures are unclear.

nvm use 8.11.3

npx tsdx create bar

Failed to install dependencies
Error: Command failed with exit code 1: yarn add @types/jest @types/react @types/react-dom husky react react-dom tsdx tslib typescript --dev

Desired Behavior

When I run tsdx create it should tell me that my current Node version is not compatible.

Suggested Solution

Add a deprecation warning for unsupported Node versions when running tsdx create, as well as add Node versions supported in the README.md, and probably add a engines attribute to the package.json describing the same limitations.

Who does this impact? Who is this for?

All users.

Additional context

I only knew this by seeing the recent releases including this PR https://github.com/jaredpalmer/tsdx/pull/426

[agilgur5]

@sw-yx I think you misinterpreted me.

It should be formally dropped in a breaking change (same as all the deps that dropped it did – it is breaking), which is what v0.14.0 is. It was not officially dropped before and is actually still supported (v0.14.0 is the next release with several breaking changes, mostly dependencies).

[sw-yx]

yup, sure thing. we can add an engines field https://stackoverflow.com/questions/29349684/how-can-i-specify-the-required-node-js-version-in-package-json and use something like check-version.js in the SO reply or something like https://www.npmjs.com/package/check-node-version