Release version 0.3.1

Fixes
---

- Test with dimod 0.9.x by default
- Stopped using hierarchical requirements include
- Simplified and updated Windows tests to work with latest AppVeyor
  setup
- Skip deploying linux/py39 package, as not all dependencies are
  available for py39.

Author: randomir

setup.py

@@ -73,7 +73,7 @@ def build_extensions(self):
 
 setup(
     name='dwave-qbsolv',
-    version='0.3.0',
+    version='0.3.1',
     packages=packages,
     package_dir={'dwave_qbsolv': 'python/dwave_qbsolv'},
     install_requires=['dimod>=0.8.1,<0.10.0'],