Add v0.12.4 CHANGELOG
Add v0.12.4 CHANGELOG

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