chore: Bump ehmon from 1fb6032 to a83590e (#912)

Bumps [ehmon](https://github.com/mbta/ehmon) from `1fb6032` to `a83590e`.
- [Commits](mbta/ehmon@1fb6032...a83590e)

---
updated-dependencies:
- dependency-name: ehmon
  dependency-version: a83590e82c09e9e4d2fdf89f1b9473e1181acbcc
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

mix.lock

@@ -17,7 +17,7 @@
   "dialyxir": {:hex, :dialyxir, "1.4.5", "ca1571ac18e0f88d4ab245f0b60fa31ff1b12cbae2b11bd25d207f865e8ae78a", [:mix], [{:erlex, ">= 0.2.7", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "b0fb08bb8107c750db5c0b324fa2df5ceaa0f9307690ee3c1f6ba5b9eb5d35c3"},
   "diskusage_logger": {:hex, :diskusage_logger, "0.2.0", "04fc48b538fe4de43153542a71ea94f623d54707d85844123baacfceedf625c3", [:mix], [], "hexpm", "e3f2aed1b0fc4590931c089a6453a4c4eb4c945912aa97bcabcc0cff7851f34d"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.39", "424642f8335b05bb9eb611aa1564c148a8ee35c9c8a8bba6e129d51a3e3c6769", [:mix], [], "hexpm", "06553a88d1f1846da9ef066b87b57c6f605552cfbe40d20bd8d59cc6bde41944"},
-  "ehmon": {:git, "https://github.com/mbta/ehmon.git", "1fb603262bd02d74a16183bd8f344dcace9d7561", [branch: "master"]},
+  "ehmon": {:git, "https://github.com/mbta/ehmon.git", "a83590e82c09e9e4d2fdf89f1b9473e1181acbcc", [branch: "master"]},
   "elixir_make": {:hex, :elixir_make, "0.8.3", "d38d7ee1578d722d89b4d452a3e36bcfdc644c618f0d063b874661876e708683", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:certifi, "~> 2.0", [hex: :certifi, repo: "hexpm", optional: true]}], "hexpm", "5c99a18571a756d4af7a4d89ca75c28ac899e6103af6f223982f09ce44942cc9"},
   "email_checker": {:hex, :email_checker, "0.2.4", "2bf246646678c8a366f2f6d2394845facb87c025ceddbd699019d387726548aa", [:mix], [{:socket, "~> 0.3.1", [hex: :socket, repo: "hexpm", optional: true]}], "hexpm", "e4ac0e5eb035dce9c8df08ebffdb525a5d82e61dde37390ac2469222f723e50a"},
   "emqtt_failover": {:hex, :emqtt_failover, "0.3.2", "d6ece68d3f691ad0c42787dbfb7ae7f48ed0400504b4697fcd63a56ba73ed9ee", [:mix], [{:backoff, "~> 1.1.6", [hex: :backoff, repo: "hexpm", optional: false]}], "hexpm", "69b1c0d53a4f9752c365dc9c13b8eaeb5ac9286540f326ca71cdf36ada8307c5"},