Typescript with moduleResolution node16/nodenext is broken

[thovden]

Description
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Building a Typescript project using packages of "type": "module" and "moduleResolution": "nodenext" is broken because the types in the exports section is not specified.

The issue is discussed here: microsoft/TypeScript#50466

Environment:
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Version 3.0.22, ESM, Node 16, Typescript, MacOS

Details
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Since Typescript does not find types with the webmidi project, it reverts to the @types/webmidi, imported by the jzz package (a dependency of webmidi). These are probably old.

frontend/audio-ui/src/events/midi-event.ts:1:39 - error TS2306: File '/Users/torgeir/dev/tunasong/node_modules/@types/webmidi/index.d.ts' is not a module.

1 import type { NoteMessageEvent } from 'webmidi'
                                        ~~~~~~~~~

To reproduce:

1. git clone https://github.com/thovden/webmidi-client-import-issue.git
2. npm i
3. tsc

The fix is easy and I will submit a PR for the fix shortly.