Summary

The published openpgp.d.ts has two issues that prevent it from working with TypeScript's --moduleResolution node16 / nodenext:

1. TS2307: openpgp.d.ts imports types from @openpgp/web-stream-tools, but it's only a devDependency, so it's not installed for consumers. This PR adds it as an optional peerDependency.

2. TS2834: The relative imports ./src/enums and ./src/config lack file extensions, which are required under node16/nodenext module resolution. This PR adds the .js extensions.

Changes

• openpgp.d.ts: Add .js extensions to relative imports (./src/enums → ./src/enums.js, ./src/config → ./src/config/index.js)
• package.json: Add @openpgp/web-stream-tools as an optional peerDependency (kept in devDependencies as well for development)

Reproduction

// tsconfig.json
{
  "compilerOptions": {
    "moduleResolution": "NodeNext",
    "module": "NodeNext"
  }
}

import { readKey } from 'openpgp';
// TS2307: Cannot find module '@openpgp/web-stream-tools'
// TS2834: Relative import paths need explicit file extensions

Partially addresses openpgpjs/web-stream-tools#10.