Bump radar to 3.8.9

[lmeier]

Instructions

1. PR target branch should be against development
2. PR title name should follow this format: https://github.com/mParticle/mparticle-workflows/blob/main/.github/workflows/pr-title-check.yml
3. PR branch prefix should follow this format: https://github.com/mParticle/mparticle-workflows/blob/main/.github/workflows/pr-branch-check-name.yml

Summary

• upgrades RadarSDK dependency to latest, 3.8.9.

Testing Plan

I haven't tested this locally – it's my first time contributing to this repo. Is there a preferred demo / example app to test with? Should be trivial.

Reference Issue (For mParticle employees only. Ignore if you are an outside contributor)

• Closes https://go.mparticle.com/work/REPLACEME

[lmeier]

Hi @BrandonStalnaker, I'm an engineer at Radar. It's my first time working with these integrations.

We're attempting to bump the radar SDK version to latest (it's pointing to a more than one year old version presently) in anticipation of a shared mparticle radar prospect evaluating our integration. Please let me know how I can help get this version bump across the line.

(analogous Android bump here)

Thanks!