handle tearDown() faiures at TestCase.run()

Exceptions at tearDown() are now captured and handled properly.

Checklist:
- run tearDown even if the test fails 👈🏼

---

Output:
➜ python3 src/test_case_test.py
6 run, 0 failed

src/test_case.py

@@ -24,7 +24,10 @@ def run(self, result) -> None:
         except:
             result.testFailed()
 
-        self.tearDown()
+        try:
+            self.tearDown()
+        except:
+            result.testFailed()
 
     def tearDown(self) -> None:
         pass