Update adapter deps

Author: josevalim

mix.exs

@@ -85,15 +85,15 @@ defmodule EctoSQL.MixProject do
     if path = System.get_env("POSTGREX_PATH") do
       {:postgrex, path: path}
     else
-      {:postgrex, "~> 0.15.0 or ~> 1.0", optional: true}
+      {:postgrex, "~> 0.15.0 or ~> 0.16.0 or ~> 1.0", optional: true}
     end
   end
 
   defp myxql_dep do
     if path = System.get_env("MYXQL_PATH") do
       {:myxql, path: path}
     else
-      {:myxql, "~> 0.4.0 or ~> 0.5.0", optional: true}
+      {:myxql, "~> 0.4.0 or ~> 0.5.0 or ~> 0.6.0", optional: true}
     end
   end