(feat) add Localstack SNS

[lucjross-favor]

This adds a Localstack SNS provider.

I tried to create a test for subscription & notification functionality that used a test HTTP controller, but that proved difficult for Docker/host networking reasons. The test now just makes sure that the create-topic operation works.

[lucjross-favor]

Also, (a) is this the right branch to merge into? and (b) could you say how soon this could go into a release?

Thanks!

[lucjross-favor]

Execution failed for task ':micronaut-test-resources-localstack-sns:findBaseline'.

Could not find a previous version for 2.6.0

How do I fix this?

[lucjross-favor]

Hi @melix , could you advise on the above? 🙏

[melix]

How do I fix this?

You need to add:

micronautBuild {
    binaryCompatibility {
        enabledAfter '2.6.0'
    }
}

in the new module's build.gradle file

[melix]

Thanks for your contribution!