relax subprocess dependency (#73)

appveyor.yml

@@ -24,7 +24,9 @@ environment:
       PYTHON_ARCH: "64"
 
 install:
+  - "%PYTHON%\\python.exe -m pip install -U setuptools^>=20.3"
   - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
+  # Note the use of a `^` to escape the `>`
 
 build_script:
   - |

cwltest/tests/util.py

@@ -1,7 +1,12 @@
 from __future__ import absolute_import
 import os
+import sys
+
+if sys.version_info < (3, 0):
+    import subprocess32 as subprocess
+else:
+    import subprocess
 
-import subprocess
 from pkg_resources import (Requirement, ResolutionError,  # type: ignore
                            resource_filename)
 

requirements.txt

@@ -1,5 +1,5 @@
 schema-salad >= 1.14
 typing>=3.6,<3.7; python_version < '3.5'
 futures >= 3.0.5; python_version == '2.7'
-subprocess32 == 3.5.0rc1; python_version < '3'
+subprocess32 >= 3.5.0; python_version < '3'
 junit-xml >= 1.8

setup.py

@@ -49,6 +49,6 @@
       cmdclass={'egg_info': tagger},
       python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <4',
       extras_require={':python_version<"3"': [
-                      'futures >= 3.0.5', 'subprocess32 == 3.5.0rc1'],
+                      'futures >= 3.0.5', 'subprocess32 >= 3.5.0'],
                       ':python_version<"3.5"': ['typing >= 3.5.2'] }
 )