Add @recursive true for all Mix tasks (#77)

This fixes elixir_make behaviour in umbrella apps.

Author: evadne

lib/mix/tasks/compile.elixir_make.ex

@@ -118,6 +118,8 @@ defmodule Mix.Tasks.Compile.ElixirMake do
   use Mix.Task
   alias ElixirMake.Artefact
 
+  @recursive true
+
   @doc false
   def run(args) do
     if function_exported?(Mix, :ensure_application!, 1) do

lib/mix/tasks/elixir_make.checksum.ex

@@ -21,6 +21,8 @@ defmodule Mix.Tasks.ElixirMake.Checksum do
   use Mix.Task
   alias ElixirMake.Artefact
 
+  @recursive true
+
   @switches [
     all: :boolean,
     only_local: :boolean,

lib/mix/tasks/elixir_make.precompile.ex

@@ -16,6 +16,8 @@ defmodule Mix.Tasks.ElixirMake.Precompile do
   require Logger
   use Mix.Task
 
+  @recursive true
+
   @impl true
   def run(args) do
     if function_exported?(Mix, :ensure_application!, 1) do