[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

schemas/filetype.yaml

@@ -62,7 +62,7 @@ classes:
             registered_extractors:
                 multivalued: true
                 required: false
-                default: null
+                default:
                 pattern: ^[a-z]+[a-z,0-9,-]*[a-z,0-9]+$
                 description: >-
                     A slot for an automatically-generated enumeration of `Extractor`