chore: Bump version 7.2.0 (#451)

Author: hneiva

src/taskgraph/__init__.py

@@ -2,7 +2,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-__version__ = "7.1.2"
+__version__ = "7.2.0"
 
 # Maximum number of dependencies a single task can have
 # https://docs.taskcluster.net/reference/platform/taskcluster-queue/references/api#createTask