roscpp_core: 0.5.4-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `roscpp_core` to `0.5.4-0`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.10`
- previous version for package: `0.5.3-0`

## cpp_common

- No changes

## roscpp_serialization

- No changes

## roscpp_traits

- No changes

## rostime

```
* fix Rate initialized by Duration (#26 <https://github.com/ros/roscpp_core/issues/26>)
```