`mix test` failed when we've existing `.recode.exs` file

[kianmeng]

Running on:

• Elixir 1.13.4-otp-25
• Erlang 25.0.2

Steps to reproduce:

• git clone https://github.com/hrzndhrn/recode
• cd recode
• mix deps.get
• mix recode.gen.config
• mix test

Failed test cases: 1) test mix recode raises exception for unknown config file (Mix.Tasks.RecodeTest) 2) test mix recode.rename raises error for missing config (Mix.Tasks.Recode.RenameTest) 3) test mix recode.gen.config (Mix.Tasks.Recode.Gen.ConfigTest)