chore(deps): update testing deps

tox.ini

@@ -23,7 +23,7 @@ passenv =
 description = Apply coding style standards to code
 deps =
     # renovate: datasource=pypi
-    ruff==0.6.8
+    ruff==0.8.3
 commands =
     ruff check --fix {[vars]all_path}
     ruff format {[vars]all_path}
@@ -32,7 +32,7 @@ commands =
 description = Check code against coding style standards
 deps =
     # renovate: datasource=pypi
-    ruff==0.6.8
+    ruff==0.8.3
 commands =
     ruff check {[vars]all_path}
     ruff format --check --diff {[vars]all_path}
@@ -60,13 +60,13 @@ description = Run integration tests
 deps =
     -r{toxinidir}/requirements.txt
     # renovate: datasource=pypi
-    juju==3.5.2.0
+    juju==3.6.0.0
     # Pin macaroonbakery due to an issue in 1.3.3 (libjuju depends on this)
     macaroonbakery==1.3.2
     # renovate: datasource=pypi
     pytest==8.3.3
     # renovate: datasource=pypi
-    pytest-operator==0.37.0
+    pytest-operator==0.39.0
     # renovate: datasource=pypi
     tenacity==9.0.0
     # renovate: datasource=pypi