Modules with only non-exported constructs should not be exported either

[alalonde]

• I have checked issues with bug label and found no duplicates

Expected Behavior

In a file with only @internal exports, the module corresponding to that file should not be exported either, and not show up in the "Globals" section. Assuming mode="modules"

Actual Behavior

The module is exported but empty. There is a link to it in the "Globals" section.

Steps to reproduce the bug

With this file src/internal.ts:

/**
 * @hidden
 */
export class Internal {
  ...
}

typedoc --mode="modules" --excludeNotExported src/

Environment

• Typedoc version: 0.15.0
• Node.js version: 10.8
• OS: Mac OS 10.12

[Gerrit0]

PR welcome, this should only require minor changes.