Use build_depend instead of depend

[Jaeyoung-Lim]

Problem Description
This PR fixes a build failure with the error as the following.

Error(s):
- The manifest of package "grpc" (with format version 1) must not contain the following tags: depend

This problem was caused by #44, where the <depend> flag is only available on the package manifest format 2 (https://www.ros.org/reps/rep-0140.html#adding-depend) and the package.xml format used in this package is still on format 1

@tomlankhorst FYI

[tkazik]

Nice catch, @Jaeyoung-Lim .
As an alternative, the maintainers could also consider migrating to format version 2 acc this guide.
Or directly to format version 3 for ros2 (details here).

[alexmillane]

Can confirm that this fixes our build over on ethz-asl/voxblox#379

[tomlankhorst]

Thanks for the quick fix!

[Jaeyoung-Lim]

@BillWSY Any chance we can get this in? The current master is broken without this change

[BillWSY]

Thanks a lot for your contributions!

[BillWSY]

Sorry I changed this PR to run_depend after approving the merge. There is already a duplicated build_depend. Please let me know if there is still any problem.

[Jaeyoung-Lim]

@BillWSY Thanks!