Bump mock from 0.3.8 to 0.3.9

Bumps [mock](https://github.com/jjh42/mock) from 0.3.8 to 0.3.9.
- [Release notes](https://github.com/jjh42/mock/releases)
- [Changelog](https://github.com/jjh42/mock/blob/master/Changelog.md)
- [Commits](jjh42/mock@v0.3.8...v0.3.9)

---
updated-dependencies:
- dependency-name: mock
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

mix.lock

@@ -13,6 +13,6 @@
   "makeup_erlang": {:hex, :makeup_erlang, "1.0.1", "c7f58c120b2b5aa5fd80d540a89fdf866ed42f1f3994e4fe189abebeab610839", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "8a89a1eeccc2d798d6ea15496a6e4870b75e014d1af514b1b71fa33134f57814"},
   "meck": {:hex, :meck, "0.9.2", "85ccbab053f1db86c7ca240e9fc718170ee5bda03810a6292b5306bf31bae5f5", [:rebar3], [], "hexpm", "81344f561357dc40a8344afa53767c32669153355b626ea9fcbc8da6b3045826"},
   "mix_unused": {:git, "https://github.com/primait/mix_unused.git", "b9abb6e066afc3ab52630c98660d0e091f6b9c57", []},
-  "mock": {:hex, :mock, "0.3.8", "7046a306b71db2488ef54395eeb74df0a7f335a7caca4a3d3875d1fc81c884dd", [:mix], [{:meck, "~> 0.9.2", [hex: :meck, repo: "hexpm", optional: false]}], "hexpm", "7fa82364c97617d79bb7d15571193fc0c4fe5afd0c932cef09426b3ee6fe2022"},
+  "mock": {:hex, :mock, "0.3.9", "10e44ad1f5962480c5c9b9fa779c6c63de9bd31997c8e04a853ec990a9d841af", [:mix], [{:meck, "~> 0.9.2", [hex: :meck, repo: "hexpm", optional: false]}], "hexpm", "9e1b244c4ca2551bb17bb8415eed89e40ee1308e0fbaed0a4fdfe3ec8a4adbd3"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
 }