feat(Dependencies): Update dependency pendulum to v3

| datasource | package  | from  | to    |
| ---------- | -------- | ----- | ----- |
| pypi       | pendulum | 2.1.2 | 3.0.0 |

requirements.txt

@@ -29,7 +29,7 @@ netifaces==0.11.0
 openstacksdk==2.1.0
 os-service-types==1.7.0
 pbr==6.0.0; python_version >= '2.6'
-pendulum==2.1.2; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+pendulum==3.0.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 prometheus-client==0.19.0
 pycparser==2.21; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 python-dateutil==2.8.2; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'