Release note suggests support for TypeScript 3.9 but show warning

[doberkofler]

Repro

The release notes for version 3.0.0 suggest multiple times that TypeScript 3.9 is supported but wa warning message is shown.

=============
WARNING: You are currently running a version of TypeScript which is not officially supported by @typescript-eslint/typescript-estree.

You may find that it works just fine, or you may not.

SUPPORTED TYPESCRIPT VERSIONS: >=3.3.1 <3.8.0

YOUR TYPESCRIPT VERSION: 3.9.3

Please only submit bug reports when using the officially supported version.
=============

Versions

package	version
@typescript-eslint/typescript-estree	3.0.0
TypeScript	3.9.3
node	14.3.0
npm	6.14.5

[bradzacher]

See pinned issue #1436

We "support" it in that it won't break, but we don't truly support it yet as we do not have a stable AST for private properties yet.

I've added a note to the release notes pointing at the above issue.

[bradzacher]

On second thought - #2075 - I'm just going to bump the version range for now.
It's not truly supported, but it won't break so it's supported enough.

We don't want to deter people from upgrading because 3.9 has performance improvements.

[doberkofler]

Thank you for caring. Maybe some distinction between supported as in "it will not break" and supported as in "it supports all new features" would be helpful for the future.