Added poetry integration.

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

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

tests/test_queries/test_nested_reverse_relations.py

@@ -31,7 +31,7 @@ class DataSourceTable(ormar.Model):
     id: int = ormar.Integer(primary_key=True)
     name: str = ormar.String(max_length=200, index=True)
     source: Optional[DataSource] = ormar.ForeignKey(
-        DataSource, name="source_id", related_name="tables", ondelete="CASCADE",
+        DataSource, name="source_id", related_name="tables", ondelete="CASCADE"
     )
 
 
@@ -43,7 +43,7 @@ class DataSourceTableColumn(ormar.Model):
     name: str = ormar.String(max_length=200, index=True)
     data_type: str = ormar.String(max_length=200)
     table: Optional[DataSourceTable] = ormar.ForeignKey(
-        DataSourceTable, name="table_id", related_name="columns", ondelete="CASCADE",
+        DataSourceTable, name="table_id", related_name="columns", ondelete="CASCADE"
     )
 
 

tests/test_queries/test_or_filters.py

@@ -130,7 +130,7 @@ async def test_or_filters():
                         )
                     )
                     & (Book.title.startswith("The"))
-                ),
+                )
             )
             .all()
         )