Added poetry integration.

Description:
* Fixed github actions;
* Removed requirements.txt;
* Fixed CONTRIBUTING.md;
* Fixed black and flake8.

Signed-off-by: Pavel <win10@list.ru>

ormar/relations/alias_manager.py

@@ -99,7 +99,7 @@ class AliasManager:
         return table.alias(f"{alias}_{table.name}")
 
     def add_relation_type(
-        self, source_model: Type["Model"], relation_name: str, reverse_name: str = None,
+        self, source_model: Type["Model"], relation_name: str, reverse_name: str = None
     ) -> None:
         """
         Registers the relations defined in ormar models.

ormar/relations/querysetproxy.py

@@ -294,7 +294,7 @@ class QuerysetProxy(Generic[T]):
         :type fields:  Union[List, str, Set, Dict]
         """
         return await self.queryset.values(
-            fields=fields, exclude_through=exclude_through,
+            fields=fields, exclude_through=exclude_through
         )
 
     async def values_list(
@@ -479,8 +479,7 @@ class QuerysetProxy(Generic[T]):
             await child.update(**kwargs)  # type: ignore
             if self.type_ == ormar.RelationType.MULTIPLE and through_kwargs:
                 await self.update_through_instance(
-                    child=child,  # type: ignore
-                    **through_kwargs,
+                    child=child, **through_kwargs  # type: ignore
                 )
         return len(children)
 

ormar/relations/relation_manager.py

@@ -57,7 +57,7 @@ class RelationsManager:
         return None  # pragma nocover
 
     @staticmethod
-    def add(parent: "Model", child: "Model", field: "ForeignKeyField",) -> None:
+    def add(parent: "Model", child: "Model", field: "ForeignKeyField") -> None:
         """
         Adds relation on both sides -> meaning on both child and parent models.
         One side of the relation is always weakref proxy to avoid circular refs.
@@ -73,7 +73,7 @@ class RelationsManager:
         :param field: field with relation definition
         :type field: ForeignKeyField
         """
-        (parent, child, child_name, to_name,) = get_relations_sides_and_names(
+        (parent, child, child_name, to_name) = get_relations_sides_and_names(
             field, parent, child
         )
 

ormar/relations/utils.py

@@ -8,7 +8,7 @@ if TYPE_CHECKING:  # pragma no cover
 
 
 def get_relations_sides_and_names(
-    to_field: ForeignKeyField, parent: "Model", child: "Model",
+    to_field: ForeignKeyField, parent: "Model", child: "Model"
 ) -> Tuple["Model", "Model", str, str]:
     """
     Determines the names of child and parent relations names, as well as