Describe the bug
A query remains indefinitely in "fetching" status when the component where it is originated crashes and the error is catched by an error boundary.

To Reproduce
I've created a codesandbox to show the bug, you can see it here: https://codesandbox.io/s/loving-grothendieck-5ovgm
Steps to reproduce the behavior:

1. Go to the codesanbox;
2. Click on "Show Posts"
3. Clos

Right now they're untrackable

Please fill in the fields below to submit an issue or feature request. The
more information that is provided, the better.

Description of issue or feature request:

When some metadata is signed with multiple keys, tuf/repository_lib.py doesn't write the signatures in a deterministic order. This occurs because of this [line](https://github.com/theupdateframework/tuf/blob/develop/tuf/r