Bump version and update HISTORY for 2.10 release.

Author: adobeDan

HISTORY.md

@@ -126,3 +126,10 @@ Bug fix release:
 
 * [Issue 58](https://github.com/adobe-apiplatform/umapi-client.py/issues/58)
     * Error when adding more than 10 groups in a single action step.
+
+### Version 2.10
+
+Enhancement release:
+
+* [Issue 33](https://github.com/adobe-apiplatform/umapi-client.py/issues/33)
+    * Allow connection configuration via environment variables.

umapi_client/version.py

@@ -18,4 +18,4 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-__version__ = "2.9"
+__version__ = "2.10"