Update munch requirement from <3,>=2.5.0 to >=2.5.0,<5

Updates the requirements on [munch](https://github.com/Infinidat/munch) to permit the latest version.
- [Release notes](https://github.com/Infinidat/munch/releases)
- [Changelog](https://github.com/Infinidat/munch/blob/develop/CHANGELOG.md)
- [Commits](Infinidat/munch@2.5.0...4.0.0)

---
updated-dependencies:
- dependency-name: munch
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -36,7 +36,7 @@
     'cornice>=5.0.3,<7',
     'simplejson>=3.17.2,<4',
     'Jinja2<4',
-    'munch>=2.5.0,<3',
+    'munch>=2.5.0,<5',
     'appdirs>=1.4.3,<2',
     'json-store>=3.1,<4',
     'python-dateutil>=2.8.0,<3',