warn on windows and OTP 26 #1097

Job	Run time
static analysis (Elixir 1.15.x \| Erlang/OTP 25.x)	24s
mix test windows (Elixir 1.13.x \| Erlang/OTP 22.x)	9m 22s
mix test (Elixir 1.12.x \| Erlang/OTP 22.x)	5m 13s
mix test windows (Elixir 1.13.x \| Erlang/OTP 23.x)	6m 29s
mix test (Elixir 1.12.x \| Erlang/OTP 23.x)	5m 39s
mix test windows (Elixir 1.13.x \| Erlang/OTP 24.x)	4m 55s
mix test (Elixir 1.12.x \| Erlang/OTP 24.x)	5m 32s
mix test windows (Elixir 1.13.x \| Erlang/OTP 25.x)	4m 24s
mix test (Elixir 1.13.x \| Erlang/OTP 22.x)	4m 21s
mix test windows (Elixir 1.14.x \| Erlang/OTP 23.x)	6m 29s
mix test (Elixir 1.13.x \| Erlang/OTP 23.x)	4m 53s
mix test windows (Elixir 1.14.x \| Erlang/OTP 24.x)	6m 47s
mix test windows (Elixir 1.14.x \| Erlang/OTP 25.x)	5m 52s
mix test (Elixir 1.13.x \| Erlang/OTP 24.x)	5m 10s
mix test windows (Elixir 1.14.x \| Erlang/OTP 26.x)	4m 37s
mix test (Elixir 1.13.x \| Erlang/OTP 25.x)	3m 14s
mix test windows (Elixir 1.15.x \| Erlang/OTP 24.x)	7m 2s
mix test (Elixir 1.14.x \| Erlang/OTP 23.x)	6m 49s
mix test windows (Elixir 1.15.x \| Erlang/OTP 25.x)	7m 12s
mix test (Elixir 1.14.x \| Erlang/OTP 24.x)	5m 29s
mix test windows (Elixir 1.15.x \| Erlang/OTP 26.x)	7m 16s
mix test (Elixir 1.14.x \| Erlang/OTP 25.x)	5m 4s
mix test (Elixir 1.14.x \| Erlang/OTP 26.x)	4m 22s
mix test (Elixir 1.15.x \| Erlang/OTP 24.x)	3m 30s
mix test (Elixir 1.15.x \| Erlang/OTP 25.x)	3m 16s
mix test (Elixir 1.15.x \| Erlang/OTP 26.x)	3m 18s
	2h 16m 39s

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