Update CHANGELOG.
Update CHANGELOG.

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