ignition-transport9: new formula

[chapulina]

Remove alias and add new formula that depends on ign-msgs6. I took the last commit of gazebosim/gz-transport#149

This is broken off #1063 so we can make the changes incrementally.

[chapulina]

CI is failing asking for a license. I didn't find any license information on any formula here, is this a new requirement? @scpeters , please advise.

==> brew audit osrf/simulation/ignition-transport9 --online --new-formula
==> FAILED
Error: 1 problem in 1 formula detected
osrf/simulation/ignition-transport9:
  * No license specified for package.

[chapulina]

Merging!

[scpeters]

CI is failing asking for a license. I didn't find any license information on any formula here, is this a new requirement?

sorry I missed this earlier

yes, this is a new requirement, but only for new formulae. I'll update the existing formulae

[scpeters]

also, when adding new formulae, we can remove the old alias, but it's also a good time to just add a new alias for the next major version. I'll take care of it for this formula

[scpeters]

also, when adding new formulae, we can remove the old alias, but it's also a good time to just add a new alias for the next major version. I'll take care of it for this formula

a08e960