Update version 0.2.7 -> 0.2.8

Author: arcondello

setup.py

@@ -75,7 +75,7 @@ def build_extensions(self):
 
 setup(
     name='dwave_qbsolv',
-    version='0.2.7',
+    version='0.2.8',
     packages=packages,
     package_dir={'dwave_qbsolv': 'python/dwave_qbsolv'},
     install_requires=['dimod>=0.6.10,<0.7.0'],