Update CHANGELOG
Update CHANGELOG

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