chore: move dependencies, add more tests

pyproject.toml

@@ -5,7 +5,10 @@ description = "Add your description here"
 readme = "README.md"
 authors = [{ name = "WorldTeacher", email = "coding_contact@pm.me" }]
 requires-python = ">=3.13"
-dependencies = ["regex>=2025.9.18"]
+dependencies = [
+    "regex>=2025.9.18",
+    "requests>=2.32.5",
+]
 
 [project.optional-dependencies]
 # SRU API feature: for accessing library catalogs via SRU protocol
@@ -46,8 +49,9 @@ pre_commit_hooks = []
 post_commit_hooks = []
 
 [dependency-groups]
-dev = ["pylint>=4.0.3"]
-test = [
+dev = [
+    "pylint>=4.0.3",
+    "pytest-mock>=3.15.1",
     "types-pysocks>=1.7.1.20251001",
     "types-regex>=2025.9.18.20250921",
     "types-requests>=2.32.4.20250913",