bayes_tracking: 1.0.4-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `bayes_tracking` to `1.0.4-0`:

- upstream repository: https://github.com/LCAS/bayestracking.git
- release repository: https://github.com/strands-project-releases/bayes_tracking.git
- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.12`
- previous version for package: `1.0.3-1`

## bayes_tracking

```
* Merge pull request #8 <https://github.com/LCAS/bayestracking/issues/8> from LCAS/opencv
  Changing dependency from opencv2 to cv_bridge for indigo release.
* Changing dependency from opencv2 to cv_bridge for indigo release.
* Contributors: Christian Dondrup
```