fix tests and update argon2 dep to remove warnings

mix.exs

@@ -32,7 +32,7 @@ defmodule Circle.MixProject do
   # Type `mix help deps` for examples and options.
   defp deps do
     [
-      {:argon2_elixir, "~> 3.0"},
+      {:argon2_elixir, "~> 4.0"},
       {:phoenix, "~> 1.7.21"},
       {:phoenix_ecto, "~> 4.5"},
       {:ecto_sql, "~> 3.10"},
@@ -58,7 +58,8 @@ defmodule Circle.MixProject do
       {:gettext, "~> 0.26"},
       {:jason, "~> 1.2"},
       {:dns_cluster, "~> 0.1.1"},
-      {:bandit, "~> 1.5"}
+      {:bandit, "~> 1.5"},
+      {:lazy_html, ">= 0.1.0", only: :test}
     ]
   end