pouchdb: deletion does not work when using bulkDocs with new_edits=false

Issue

In the docs it is described how to delete documents with bulkDocs(). Also how to use new_edits: false to set a custom revision. But when I set _deleted: true AND new_edits: false, the document will not get deleted at all. Also there is no error thrown.

My use case is to create a custom replication plugin. But at the moment this is not possible because I cannot replicate a deleted document from another server while keeping the revision.

Info

• Environment: Tested in Node.js and Browser
• Adapter: Tested with IndexedDB and memory

Reproduce

I made a test case to reproduce this. Here is the jsbin

function createDB() {
    // recreates the database on each run
    const db = new PouchDB('things');
    return db.destroy().then(() => new PouchDB('things'));
}

async function run() {

    const db = await createDB();
    await db.put({
        _id: 'Alice',
        age: 42
    });

    await db.bulkDocs(
        [
            {
                _id: 'Alice',
                _deleted: true,
                _rev: '2-my-custom-revision'
            }
        ],
        {
            new_edits: false
        }
    );

    const docsAfter = await db.allDocs({
        include_docs: true
    });

    console.dir(docsAfter);

    if (docsAfter.rows.length !== 0) {
        throw new Error('after deleting the document, allDocs() should return 0 rows');
    }
}
run();

Overwriting docs, without deletion, works this way. Only when _deleted: true it does not.