Set version to 0.2.7

Author: Rudolfs Osins

setup.py

@@ -3,11 +3,11 @@
 setup(
     name='gatt',
     packages=['gatt'],
-    version='0.2.6',
+    version='0.2.7',
     description='Bluetooth GATT SDK for Python',
     keywords='gatt',
     url='https://github.com/getsenic/gatt-python',
-    download_url='https://github.com/getsenic/gatt-python/archive/0.2.6.tar.gz',
+    download_url='https://github.com/getsenic/gatt-python/archive/0.2.7.tar.gz',
     author='Senic GmbH',
     author_email='developers@senic.com',
     license='MIT',