Elixir CI

refactors a bunch of tests #657

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2 errors and 5 warnings

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Mix.Project.compile/1 is deprecated. Use Mix.Task.run("compile", args) instead

variable "kv" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "list" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "module" is unused (if the variable is not meant to be used, prefix it with an underscore)