Mix.CLITest: explicitly declare environment variables (Windows-friendly)
Mix.CLITest: explicitly declare environment variables (Windows-friendly)

ggcampinho/elixir,gfvcastro/elixir,kimshrier/elixir,beedub/elixir,gfvcastro/elixir,pedrosnk/elixir,lexmag/elixir,beedub/elixir,michalmuskala/elixir,kelvinst/elixir,lexmag/elixir,ggcampinho/elixir,antipax/elixir,pedrosnk/elixir,antipax/elixir,elixir-lang/elixir,joshprice/elixir,kimshrier/elixir,kelvinst/elixir