feat: strategy variants

[andreas-unleash]

Implements strategy variants based on the client-specifications v4.3.0

About the changes

Closes #

Important files

Discussion points

[sonatype-lift]

Sonatype Lift is retiring

Sonatype Lift will be retiring on Sep 12, 2023, with its analysis stopping on Aug 12, 2023. We understand that this news may come as a disappointment, and Sonatype is committed to helping you transition off it seamlessly. If you’d like to retain your data, please export your issues from the web console.
We are extremely grateful and thank you for your support over the years.

📖 Read about the impacts and timeline

[sonatype-lift]

🛠 Lift Auto-fix

Some of the Lift findings in this PR can be automatically fixed. You can download and apply these changes in your local project directory of your branch to review the suggestions before committing.¹

# Download the patch
curl https://lift.sonatype.com/api/patch/github.com/Unleash/unleash-client-java/205.diff -o lift-autofixes.diff

# Apply the patch with git
git apply lift-autofixes.diff

# Review the changes
git diff

Want it all in a single command? Open a terminal in your project's directory and copy and paste the following command:

curl https://lift.sonatype.com/api/patch/github.com/Unleash/unleash-client-java/205.diff | git apply

Once you're satisfied, commit and push your changes in your project.

Footnotes

1. You can preview the patch by opening the patch URL in the browser. ↩