use Thread instead of Pool due to python 3.7 issue

gooey/__init__.py

@@ -2,4 +2,4 @@ import os
 from gooey.python_bindings.gooey_decorator import Gooey
 from gooey.python_bindings.gooey_parser import GooeyParser
 
-__version__ = '1.0.1'
+__version__ = '1.0.2'

gooey/gui/processor.py

@@ -3,7 +3,7 @@ import re
 import subprocess
 import sys
 from functools import partial
-from multiprocessing.dummy import Pool
+from threading import Thread
 
 from gooey.gui import events
 from gooey.gui.pubsub import pub
@@ -52,7 +52,10 @@ class ProcessController(object):
                 command,
                 bufsize=1, stdout=subprocess.PIPE, stdin=subprocess.PIPE,
                 stderr=subprocess.STDOUT, shell=True, env=env)
-        Pool(1).apply_async(self._forward_stdout, (self._process,))
+
+        t = Thread(target=self._forward_stdout, args=(self._process,))
+        t.start()
+        
 
     def _forward_stdout(self, process):
         '''

setup.py

@@ -6,7 +6,7 @@ from setuptools import setup, find_packages
 with open('README.md') as readme:
     long_description = readme.read()
 
-version = '1.0.1'
+version = '1.0.2'
 
 deps = [
     'Pillow>=4.3.0',