Dependency Checking (#75)

* Adds req testing methodology, needs fixes

* Improves dependency exception handling

* Better meets_requirements implementation

Still need to adjust tests to fake installation

* Changes to exception boolean to enable tool check

tests and class variables modified for new tool check

* Adjust test_get_scans to use appropriate variable

* Adds Go requirement where relevant

* Adds missing scan dependencies

* Add clarification to error message

tests/test_web/test_targets.py

@@ -13,6 +13,7 @@ class TestGatherWebTargets:
         self.scan = GatherWebTargets(
             target_file=__file__, results_dir=str(self.tmp_path), db_location=str(self.tmp_path / "testing.sqlite")
         )
+        self.scan.exception = False
 
     def teardown_method(self):
         shutil.rmtree(self.tmp_path)