Update github.com/golang/groupcache commit hash to 8c9f03a

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/golang/groupcache	require	digest	215e871 -> 8c9f03a

---

Renovate configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever PR becomes conflicted, or if you tick the rebase/retry checkbox below.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by WhiteSource Renovate. View repository job log here.

[codecov]

Codecov Report

Merging #5 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #5   +/-   ##
=======================================
  Coverage   86.66%   86.66%           
=======================================
  Files           1        1           
  Lines          75       75           
=======================================
  Hits           65       65           
  Misses          5        5           
  Partials        5        5

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update bfb0ee2...1770079. Read the comment docs.