update CHANGELOG and bump version to 6.6.0

Author: basepi

CHANGELOG.asciidoc

@@ -30,10 +30,12 @@ endif::[]
 //===== Bug fixes
 
 
-=== Unreleased
+[[release-notes-6.x]]
+=== Python Agent version 6.x
+
+[[release-notes-6.6.0]]
+==== 6.6.0 - 2021-10-18
 
-// Unreleased changes go here
-// When the next release happens, nest these changes under the "Python Agent version 6.x" heading
 [float]
 ===== Features
 
@@ -49,8 +51,6 @@ endif::[]
 * Remove problematic (and duplicate) `event.dataset` from logging integrations {pull}1365[#1365]
 * Fix for memcache instrumentation when configured with a unix socket {pull}1357[#1357]
 
-[[release-notes-6.x]]
-=== Python Agent version 6.x
 
 [[release-notes-6.5.0]]
 ==== 6.5.0 - 2021-10-04

elasticapm/version.py

@@ -28,5 +28,5 @@
 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-__version__ = (6, 5, 0)
+__version__ = (6, 6, 0)
 VERSION = ".".join(map(str, __version__))