Update to Protobuf 4.29.3

[tredpath]

Update the protobuf library and protoc to 4.29.3 for #136. Updated sbt-protoc to 1.0.7 and compilerplugin to 0.11.17.

I updated the proto file in geojson-proto to use proto3 syntax. The changes were minimal, only the required flag had to be dropped since it isn't needed anymore.

All tests passed with the updates but I had to modify the build script locally to get the updated geojson-proto library to be used by the core library.

jackson-core, commons-compress, and zstd-jni can be updated without breaking anything internal to this library but I didn't include them as part of this pull request.

[tredpath]

I updated the pull request to install SBT in both the pull request and release actions. It looks like it was dropped from the ubuntu-latest runner as of December last year.

[RomanIakovlev]

Here's hoping that changing the geojson-proto version to 1.1.5-SNAPSHOT would resolve the tests failures in this PR.

[tredpath]

I'm not sure how to best get the tests to run, maybe split it into two pull requests. The way build.sbt is setup the core project always pulls geojson-proto from the dependency manager so it will never make use of local changes. To test it I had to compile the project with changes to geojson-proto, update the core project to reference the compiled output and the protobuf-java library instead of the remote geojson-proto library, then compile it again.

[RomanIakovlev]

Yeah, I'm not even sure why the tests are failing now. The only thing that's changed for the core sub-project is the sbt plugin versions, the rest of the changes are only for the geojson-proto, which shouldn't impact the tests of the core.

I generally agree with the idea of trying to make this PR smaller and see if there's some way to make the tests pass while still upgrading the protobuf dependency in the geojson-proto sub-project.

I'm also not sure why we had to switch to proto3 syntax here, is proto2 not supported by protoc 4.x anymore?

[RomanIakovlev]

I've done some testing, and it seems we can fix the tests failing by keeping the proto2 syntax and required fields in place. In other words, just revert the commit tredpath/timeshape@1b4a124 from this PR, keeping everything else the same.

@tredpath could you please give it a try? For some reason I couldn't push to your branch myself.

[RomanIakovlev]

This should be 1.1.5, not 1.1.6-SNAPSHOT. My bad, I was resolving conflicts with master and typed the wrong value.