build(deps): bump tz from 0.26.5 to 0.26.6

Bumps [tz](https://github.com/mathieuprog/tz) from 0.26.5 to 0.26.6.
- [Release notes](https://github.com/mathieuprog/tz/releases)
- [Changelog](https://github.com/mathieuprog/tz/blob/master/CHANGELOG.md)
- [Commits](mathieuprog/tz@v0.26.5...v0.26.6)

---
updated-dependencies:
- dependency-name: tz
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

mix.lock

@@ -40,7 +40,7 @@
   "telemetry": {:hex, :telemetry, "1.2.1", "68fdfe8d8f05a8428483a97d7aab2f268aaff24b49e0f599faa091f1d4e7f61c", [:rebar3], [], "hexpm", "dad9ce9d8effc621708f99eac538ef1cbe05d6a874dd741de2e689c47feafed5"},
   "tesla": {:hex, :tesla, "1.7.0", "a62dda2f80d4f8a925eb7b8c5b78c461e0eb996672719fe1a63b26321a5f8b4e", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:exjsx, ">= 3.0.0", [hex: :exjsx, repo: "hexpm", optional: true]}, {:finch, "~> 0.13", [hex: :finch, repo: "hexpm", optional: true]}, {:fuse, "~> 2.4", [hex: :fuse, repo: "hexpm", optional: true]}, {:gun, "~> 1.3", [hex: :gun, repo: "hexpm", optional: true]}, {:hackney, "~> 1.6", [hex: :hackney, repo: "hexpm", optional: true]}, {:ibrowse, "4.4.0", [hex: :ibrowse, repo: "hexpm", optional: true]}, {:jason, ">= 1.0.0", [hex: :jason, repo: "hexpm", optional: true]}, {:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.0", [hex: :mint, repo: "hexpm", optional: true]}, {:msgpax, "~> 2.3", [hex: :msgpax, repo: "hexpm", optional: true]}, {:poison, ">= 1.0.0", [hex: :poison, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: true]}], "hexpm", "2e64f01ebfdb026209b47bc651a0e65203fcff4ae79c11efb73c4852b00dc313"},
   "thousand_island": {:hex, :thousand_island, "1.3.5", "6022b6338f1635b3d32406ff98d68b843ba73b3aa95cfc27154223244f3a6ca5", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "2be6954916fdfe4756af3239fb6b6d75d0b8063b5df03ba76fd8a4c87849e180"},
-  "tz": {:hex, :tz, "0.26.5", "bfe8efa345670f90351c5c31d22455d0307c5d9895fbdede7deeb215a7b60dbe", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:mint, "~> 1.5", [hex: :mint, repo: "hexpm", optional: true]}], "hexpm", "c4f9392d710582c7108b6b8c635f4981120ec4b2072adbd242290fc842338183"},
+  "tz": {:hex, :tz, "0.26.6", "4d46178dd5bc4d2c1e78c9affcc3fd46764e29cd2a148c06666edb83cb18629f", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:mint, "~> 1.6", [hex: :mint, repo: "hexpm", optional: true]}], "hexpm", "9ca97ea48b412f2404740867f6c321ee8ce112602035bb79b0b90c9c03174652"},
   "unicode_util_compat": {:hex, :unicode_util_compat, "0.7.0", "bc84380c9ab48177092f43ac89e4dfa2c6d62b40b8bd132b1059ecc7232f9a78", [:rebar3], [], "hexpm", "25eee6d67df61960cf6a794239566599b09e17e668d3700247bc498638152521"},
   "webmentions": {:hex, :webmentions, "3.0.1", "bb9845e996830db1da87d2401c424e9fed188370a7f8917a4b68a79f1a8ff349", [:mix], [{:floki, "~> 0.23", [hex: :floki, repo: "hexpm", optional: false]}, {:tesla, "~> 1.7.0", [hex: :tesla, repo: "hexpm", optional: false]}], "hexpm", "e342264e35f55630dde7f72422f1a4aa0c3fba8e9af6330b0ec2526025c8f4ad"},
   "websock": {:hex, :websock, "0.5.3", "2f69a6ebe810328555b6fe5c831a851f485e303a7c8ce6c5f675abeb20ebdadc", [:mix], [], "hexpm", "6105453d7fac22c712ad66fab1d45abdf049868f253cf719b625151460b8b453"},