Remove warning and use spago (in makefile)

.gitignore

@@ -4,3 +4,4 @@ ebin/
 erl_crash.dump
 output/
 .psc-package/
+.spago/

.prettierrc.js

@@ -0,0 +1,3 @@
+module.exports = {
+  plugins: [ process.env.PRETTIER_PURESCRIPT ],
+}

Makefile

@@ -1,13 +1,16 @@
-.PHONY: ps erl all test
+.PHONY: ps erl all test clean distclean
 
-all: ps erl
+.DEFAULT_GOAL := ps
+
+all: test
 
 ps:
-	psc-package sources | xargs purs compile 'test/**/*.purs' 'src/**/*.purs' 
+	@spago build
 
-erl: ps
-	mkdir -p ebin
-	erlc -o ebin/ output/*/*.erl
+clean:
+	rm -rf output
 
-test: erl
-	erl -pa ebin -noshell -eval '(test_main@ps:main())()' -eval 'init:stop()'
+distclean: clean
+	rm -rf .spago
+test: 
+	@spago -x test.dhall test

spago.dhall

@@ -10,7 +10,6 @@ You can edit this file as you like.
   , "foreign"
   , "integers"
   , "prelude"
-  , "unsafe-coerce"
   ]
 , packages = ./packages.dhall
 , sources = [ "src/**/*.purs" ]

src/Erl/Process.purs

@@ -24,14 +24,13 @@ module Erl.Process
 
 import Prelude
 import Data.Either (Either)
-import Data.Time.Duration (Milliseconds(..))
+import Data.Time.Duration (Milliseconds)
 import Effect (Effect)
 import Effect.Class (class MonadEffect, liftEffect)
 import Erl.Process.Raw (ExitReason(..), ExitMsg(..)) as RawExport
-import Erl.Process.Raw (ExitReason, getPid)
+import Erl.Process.Raw (ExitReason)
 import Erl.Process.Raw as Raw
 import Foreign (Foreign)
-import Unsafe.Coerce (unsafeCoerce)
 
 newtype Process (a :: Type)
   = Process Raw.Pid