Update version to dev version

Author: rhpvorderman

setup.py

@@ -152,7 +152,7 @@ def build_isa_l():
 
 setup(
     name="isal",
-    version="0.6.1",
+    version="0.7.0-dev",
     description="Faster zlib and gzip compatible compression and "
                 "decompression by providing python bindings for the ISA-L "
                 "library.",

src/isal/__init__.py

@@ -39,4 +39,4 @@
     "__version__"
 ]
 
-__version__ = "0.6.1"
+__version__ = "0.7.0-dev"