docs: docstrings for schema version classes (#946)

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

Author: jkowalleck

cyclonedx/schema/schema.py

@@ -23,8 +23,8 @@
 from . import SchemaVersion
 
 
-class BaseSchemaVersion(ABC, ViewType):
-
+class BaseSchemaVersion(ViewType, ABC):
+    """Base class for schema version views."""
     @property
     @abstractmethod
     def schema_version_enum(self) -> SchemaVersion:
@@ -35,56 +35,56 @@ def get_schema_version(self) -> str:
 
 
 class SchemaVersion1Dot7(BaseSchemaVersion):
-
+    """Schema version views 1.7"""
     @property
     def schema_version_enum(self) -> Literal[SchemaVersion.V1_7]:
         return SchemaVersion.V1_7
 
 
 class SchemaVersion1Dot6(BaseSchemaVersion):
-
+    """Schema version views 1.6"""
     @property
     def schema_version_enum(self) -> Literal[SchemaVersion.V1_6]:
         return SchemaVersion.V1_6
 
 
 class SchemaVersion1Dot5(BaseSchemaVersion):
-
+    """Schema version views 1.5"""
     @property
     def schema_version_enum(self) -> Literal[SchemaVersion.V1_5]:
         return SchemaVersion.V1_5
 
 
 class SchemaVersion1Dot4(BaseSchemaVersion):
-
+    """Schema version views 1.4"""
     @property
     def schema_version_enum(self) -> Literal[SchemaVersion.V1_4]:
         return SchemaVersion.V1_4
 
 
 class SchemaVersion1Dot3(BaseSchemaVersion):
-
+    """Schema version views 1.3"""
     @property
     def schema_version_enum(self) -> Literal[SchemaVersion.V1_3]:
         return SchemaVersion.V1_3
 
 
 class SchemaVersion1Dot2(BaseSchemaVersion):
-
+    """Schema version views 1.2"""
     @property
     def schema_version_enum(self) -> Literal[SchemaVersion.V1_2]:
         return SchemaVersion.V1_2
 
 
 class SchemaVersion1Dot1(BaseSchemaVersion):
-
+    """Schema version views 1.1"""
     @property
     def schema_version_enum(self) -> Literal[SchemaVersion.V1_1]:
         return SchemaVersion.V1_1
 
 
 class SchemaVersion1Dot0(BaseSchemaVersion):
-
+    """Schema version views 1.0"""
     @property
     def schema_version_enum(self) -> Literal[SchemaVersion.V1_0]:
         return SchemaVersion.V1_0