Bump credo from 1.1.5 to 1.2.0

Bumps [credo](https://github.com/rrrene/credo) from 1.1.5 to 1.2.0.
- [Release notes](https://github.com/rrrene/credo/releases)
- [Changelog](https://github.com/rrrene/credo/blob/master/CHANGELOG.md)
- [Commits](rrrene/credo@v1.1.5...v1.2.0)

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

mix.exs

@@ -60,7 +60,7 @@ defmodule GitHooks.MixProject do
   defp deps do
     [
       {:blankable, "~> 1.0.0"},
-      {:credo, "~> 1.1.0", only: [:dev, :test], runtime: false},
+      {:credo, "~> 1.2.0", only: [:dev, :test], runtime: false},
       {:dialyxir, "~> 1.0.0-rc.7", only: [:dev], runtime: false},
       {:ex_doc, "~> 0.21", only: :dev, runtime: false},
       {:excoveralls, "~> 0.10", only: :test},

mix.lock

@@ -2,7 +2,7 @@
   "blankable": {:hex, :blankable, "1.0.0", "89ab564a63c55af117e115144e3b3b57eb53ad43ba0f15553357eb283e0ed425", [:mix], [], "hexpm"},
   "bunt": {:hex, :bunt, "0.2.0", "951c6e801e8b1d2cbe58ebbd3e616a869061ddadcc4863d0a2182541acae9a38", [:mix], [], "hexpm"},
   "certifi": {:hex, :certifi, "2.5.1", "867ce347f7c7d78563450a18a6a28a8090331e77fa02380b4a21962a65d36ee5", [:rebar3], [{:parse_trans, "~>3.3", [hex: :parse_trans, repo: "hexpm", optional: false]}], "hexpm"},
-  "credo": {:hex, :credo, "1.1.5", "caec7a3cadd2e58609d7ee25b3931b129e739e070539ad1a0cd7efeeb47014f4", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm"},
+  "credo": {:hex, :credo, "1.2.0", "a6a0020ea014ec0eb295c24e43ea24e2cf50b9f987a9ba86bb1f40816662e830", [:mix], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm"},
   "dialyxir": {:hex, :dialyxir, "1.0.0-rc.7", "6287f8f2cb45df8584317a4be1075b8c9b8a69de8eeb82b4d9e6c761cf2664cd", [:mix], [{:erlex, ">= 0.2.5", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm"},
   "earmark": {:hex, :earmark, "1.4.2", "3aa0bd23bc4c61cf2f1e5d752d1bb470560a6f8539974f767a38923bb20e1d7f", [:mix], [], "hexpm"},
   "erlex": {:hex, :erlex, "0.2.5", "e51132f2f472e13d606d808f0574508eeea2030d487fc002b46ad97e738b0510", [:mix], [], "hexpm"},