chore(deps): match bson version with mongodb's bson version

[hasezoey]

Summary

This PR updates mongoose's bson dependency version to match mongodb's bson version.
Because package managers that upgrade might decide to stay on the old version for mongoose but use newer for mongodb (like yarn 1x), as i had encountered while updating typegoose.
Mismatched version can cause (runtime) type check failures, like:

    expect(received).toBeInstanceOf(expected)

    Expected constructor: ObjectId
    Received constructor: ObjectId

      422 |
      423 |   found.mapped.forEach((v) => {
    > 424 |     expect(v).toBeInstanceOf(mongoose.Types.ObjectId);
          |               ^
      425 |   });
      426 |
      427 |   await found.populate('mapped.$*');

      at test/tests/ref.test.ts:424:15
          at MongooseMap.forEach (<anonymous>)
      at Object.<anonymous> (test/tests/ref.test.ts:423:16)

[hasezoey]

Also i have noticed that there is no 8.12.0 branch or PR, should there be?

[vkarpov15]

Re: 8.12.0 branch or PR, I skipped the 8.12 release PR because 8.12 was just updating MongoDB Node driver version. However, in hindsight, I should've just made a PR so we could've also caught this version inconsistency. I will do so in the future. Thanks 👍