pkg: add requests_mock as dev dependency

Add test dependency `requests_mock` to the `development` extra requirements in `setup.py`

Author: sebix

CHANGELOG.md

@@ -104,6 +104,7 @@ CHANGELOG
 - Switch from nosetests to pytest, as the former does not support Python 3.10 (PR#2140 by Sebastian Wagner).
 - CodeQL Github Actions `exponential backtracking on strings` fixed. (PR#2148 by Sebastian Waldbauer, fixes #2138)
 - Reverse DNS expert tests: remove outdated failing test `test_invalid_ptr` (PR#2208 by Sebastian Wagner, fixes #2206).
+- Add test dependency `requests_mock` to the `development` extra requirements in `setup.py` (PR#2210 by Sebastian Wagner).
 
 ### Tools
 - `intelmqctl`: fix process manager initialization if run non-interactively, as intelmqdump does it (PR#2189 by Sebastian Wagner, fixes 2188).

setup.py

@@ -51,6 +51,7 @@
     extras_require={
         'development': [
             'Cerberus',
+            'requests_mock',
         ],
     },
     packages=find_packages(),