chore(deps): update to function-sdk-go:v0.3.0

[jbw976]

Description of your changes

This PR bumps this template repo up to the latest release of function-sdk-go:v0.3.0.

Release notes: https://github.com/crossplane/function-sdk-go/releases/tag/v0.3.0

Closes #80
Closes #72
Closes #71

I've tested this locally with the steps from the main README.md, all of which succeeed:

go generate ./...
go test ./...
docker build . --tag=runtime
crossplane xpkg build -f package --embed-runtime-image=runtime

I'll also take this for a test spin through the Write a Composition Function in Go guide in the docs.

I have:

• Read and followed Crossplane's contribution process.
• Added or updated unit tests for my change.

[jbw976]

Ah, looks like Renovate was trying to do something similar with #80, but since this requires some manual updates to the xfn v1 types, I'll go ahead and set this PR to close that one (and a few others). Thank you though Renovate!

Looks like errors for building now though, I think because of the go version bump without also bumping the CI workflow files. I'll look into that too.

[jbw976]

Sweet, all checks (linting/building/etc.) are passing green now! 🟢

[blakeromano]

This LGTM...

Although we should make a follow up issue once this is fixed in Crossplane Core crossplane/crossplane#5971 to update the package metadata api version.

[jbw976]

Docs update PR to update the go function guide as well: crossplane/docs#814

[jbw976]

Although we should make a follow up issue once this is fixed in Crossplane Core crossplane/crossplane#5971 to update the package metadata api version.

Good call @blakeromano, thanks for taking a look and thanks for that reminder! I've opened #82 to track that bump 👍

[phisco]

Thanks @jbw976 and @blakeromano 🙏