Fix test images and test recipe (crystal-lang#218)

Author: straight-shoota

packages/Makefile

@@ -5,6 +5,6 @@
 # * docker
 # * https://github.com/bats-core/bats-core
 
-.phony: test
+.PHONY: test
 test:
-	bats -j4 test
+	bats test

packages/test/fedora.bats

@@ -5,9 +5,9 @@
 }
 
 @test "Fedora 37" {
-  ./test-install-on-docker.sh fedora:34
+  ./test-install-on-docker.sh fedora:37
 }
 
 @test "Fedora 36" {
-  ./test-install-on-docker.sh fedora:33
+  ./test-install-on-docker.sh fedora:36
 }