Broken autoimport of module without index reexport

Demo: https://github.com/zerkalica/ts-references-autoimport-bug/tree/no-autoimport-wo-index TypeScript Version: 4.0.2 VSCode Version: 1.49.2 OS: Ubuntu 20.04.1 LTS ## Example 1 Package 'b' depends on 'a', but 'a' has no index.ts and types in package.json. Steps to reproduce 1. clone, switch to no-autoimport-wo-index, yarn install 2. Open lib/b/b.ts in vscode, type `someA` 3. Expected: autoimport suggest `import { someA } from '@some/lib-a/a'`, actual: no autoimport ## Example 2 Package 'd' depends only on 'c', 'c' depends on 'a', but 'a' has no index.ts and types in package.json. Steps to reproduce 1. clone, switch to no-autoimport-wo-index, yarn install 2. Open lib/d/d.ts in vscode, type `someA` 3. Expected: no someA in autoimport, actual: autoimport suggests broken `import { someA } from '../a/a'`