fix dialyzer #395

Job	Run time
static analysis (Elixir 1.15.x \| Erlang/OTP 26.x)	3m 16s
mix test (Elixir 1.13.x \| Erlang/OTP 22.x)	56s
mix test (Elixir 1.13.x \| Erlang/OTP 23.x)	1m 10s
mix test windows (Elixir 1.13.x \| Erlang/OTP 22.x)	1m 35s
mix test (Elixir 1.13.x \| Erlang/OTP 24.x)	1m 10s
mix test windows (Elixir 1.13.x \| Erlang/OTP 23.x)	1m 49s
mix test (Elixir 1.13.x \| Erlang/OTP 25.x)	1m 9s
mix test windows (Elixir 1.13.x \| Erlang/OTP 24.x)	1m 50s
mix test (Elixir 1.14.x \| Erlang/OTP 23.x)	1m 9s
mix test windows (Elixir 1.13.x \| Erlang/OTP 25.x)	2m 9s
mix test (Elixir 1.14.x \| Erlang/OTP 24.x)	58s
mix test windows (Elixir 1.14.x \| Erlang/OTP 23.x)	1m 48s
mix test (Elixir 1.14.x \| Erlang/OTP 25.x)	56s
mix test windows (Elixir 1.14.x \| Erlang/OTP 24.x)	1m 45s
mix test (Elixir 1.14.x \| Erlang/OTP 26.x)	53s
mix test windows (Elixir 1.14.x \| Erlang/OTP 25.x)	1m 45s
mix test (Elixir 1.15.x \| Erlang/OTP 24.x)	1m 9s
mix test windows (Elixir 1.14.x \| Erlang/OTP 26.x)	1m 49s
mix test (Elixir 1.15.x \| Erlang/OTP 25.x)	1m 3s
mix test windows (Elixir 1.15.x \| Erlang/OTP 24.x)	1m 40s
mix test (Elixir 1.15.x \| Erlang/OTP 26.x)	48s
mix test windows (Elixir 1.15.x \| Erlang/OTP 25.x)	1m 50s
mix test windows (Elixir 1.15.x \| Erlang/OTP 26.x)	1m 43s
	34m 20s

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