Use exit_code over exit_status due to getting the wrong exit value when an exception happens. exit_status will be deprecated in future versions of crystal. Fixes #434 (#448)

Author: jwoertink

src/lucky.cr

@@ -43,15 +43,15 @@ elsif task_precompiled?
     input: STDIN,
     output: STDOUT,
     error: STDERR
-  ).exit_status
+  ).exit_code
 elsif File.file?(tasks_file)
   exit Process.run(
     "crystal run #{tasks_file} -- #{args}",
     shell: true,
     input: STDIN,
     output: STDOUT,
     error: STDERR
-  ).exit_status
+  ).exit_code
 else
   puts <<-MISSING_TASKS_FILE