fixed bugs, created more tests and switched to flake8 for linting

Author: notactuallyfinn

.flake8

@@ -0,0 +1,3 @@
+[flake8]
+max-complexity = 15
+max-line-length = 120

.gitignore

@@ -11,4 +11,3 @@ src/hermes_toml/util/__pycache__/
 __pycache__/
 .hermes/
 .coverage
-.flake8

src/hermes_toml/harvest.py

@@ -38,7 +38,7 @@ class TomlHarvestPlugin(HermesHarvestPlugin):
         },
         "poetry": {
             "name": "schema:name", "version": "schema:version", "description": "schema:description",
-            "keywords": "schema:keywords", "repository": "schema:CodeRepository"
+            "keywords": "schema:keywords", "repository": "schema:codeRepository"
         },
         "flit": {
             "keywords": "schema:keywords", "dist-name": "schema:name",
@@ -375,6 +375,10 @@ def handle_pypi_classifieres(cls, classifiers: str | list[str], data):
             return
         if isinstance(classifiers, str):
             classifiers = [classifiers]
+        else:
+            classifiers = [classifier for classifier in classifiers if isinstance(classifier, str)]
+            if len(classifiers) == 0:
+                return
 
         # remove duplicates
         classifiers = list(set(classifiers))
@@ -385,8 +389,6 @@ def handle_pypi_classifieres(cls, classifiers: str | list[str], data):
         }
         # iterate over all classifiers and put them into the correct buckets
         for classifier in classifiers:
-            if not isinstance(classifier, str):
-                continue
             classifier = classifier.split(" :: ")
             if len(classifier) < 2:
                 continue