run black over stubs, add checking to travis

django-stubs/contrib/postgres/fields/array.pyi

@@ -4,8 +4,7 @@ from django.db.models.fields import Field
 
 from .mixins import CheckFieldDefaultMixin
 
-_T = TypeVar('_T', bound=Field)
-
+_T = TypeVar("_T", bound=Field)
 
 class ArrayField(CheckFieldDefaultMixin, Field, Generic[_T]):
     empty_strings_allowed: bool = ...
@@ -14,10 +13,7 @@ class ArrayField(CheckFieldDefaultMixin, Field, Generic[_T]):
     size: Any = ...
     default_validators: Any = ...
     from_db_value: Any = ...
-
-    def __init__(
-        self, base_field: _T, size: None = ..., **kwargs: Any
-    ) -> None: ...
+    def __init__(self, base_field: _T, size: None = ..., **kwargs: Any) -> None: ...
     @property
     def model(self): ...
     @model.setter
@@ -27,18 +23,12 @@ class ArrayField(CheckFieldDefaultMixin, Field, Generic[_T]):
     @property
     def description(self): ...
     def db_type(self, connection: Any): ...
-    def get_db_prep_value(
-        self, value: Any, connection: Any, prepared: bool = ...
-    ): ...
-    def deconstruct(
-        self
-    ) -> Tuple[
-        None, str, List[Any], Dict[str, Optional[Union[bool, Field]]]
-    ]: ...
+    def get_db_prep_value(self, value: Any, connection: Any, prepared: bool = ...): ...
+    def deconstruct(self) -> Tuple[None, str, List[Any], Dict[str, Optional[Union[bool, Field]]]]: ...
     def to_python(self, value: Any): ...
     def value_to_string(self, obj: Any): ...
     def get_transform(self, name: Any): ...
     def validate(self, value: Any, model_instance: Any) -> None: ...
     def run_validators(self, value: Any) -> None: ...
     def formfield(self, **kwargs: Any): ...
-    def __get__(self, instance, owner) -> List[_T]: ...
+    def __get__(self, instance, owner) -> List[_T]: ...

django-stubs/contrib/postgres/fields/jsonb.pyi

@@ -5,15 +5,9 @@ from django.db.models import Field
 
 from .mixins import CheckFieldDefaultMixin
 
-
 class JsonAdapter(object):
     encoder: Any = ...
-    def __init__(
-        self,
-        adapted: Any,
-        dumps: Optional[Any] = ...,
-        encoder: Optional[Any] = ...,
-    ) -> None: ...
+    def __init__(self, adapted: Any, dumps: Optional[Any] = ..., encoder: Optional[Any] = ...) -> None: ...
     def dumps(self, obj: Any): ...
 
 class JSONField(CheckFieldDefaultMixin, Field):
@@ -22,20 +16,12 @@ class JSONField(CheckFieldDefaultMixin, Field):
     default_error_messages: Any = ...
     encoder: Any = ...
     def __init__(
-        self,
-        verbose_name: None = ...,
-        name: None = ...,
-        encoder: Optional[Type[JSONEncoder]] = ...,
-        **kwargs: Any
+        self, verbose_name: None = ..., name: None = ..., encoder: Optional[Type[JSONEncoder]] = ..., **kwargs: Any
     ) -> None: ...
     def db_type(self, connection: Any): ...
-    def deconstruct(
-        self
-    ) -> Tuple[
-        None, str, List[Any], Dict[str, Union[Type[JSONEncoder], bool]]
-    ]: ...
+    def deconstruct(self) -> Tuple[None, str, List[Any], Dict[str, Union[Type[JSONEncoder], bool]]]: ...
     def get_transform(self, name: Any): ...
     def get_prep_value(self, value: Any): ...
     def validate(self, value: Any, model_instance: Any) -> None: ...
     def value_to_string(self, obj: Any): ...
-    def formfield(self, **kwargs: Any): ...
+    def formfield(self, **kwargs: Any): ...

django-stubs/contrib/postgres/fields/mixins.pyi

@@ -1,5 +1,4 @@
 from typing import Any, List, Optional
 
-
 class CheckFieldDefaultMixin:
     def check(self, **kwargs: Any) -> List[Any]: ...

django-stubs/contrib/postgres/fields/ranges.pyi

@@ -2,7 +2,6 @@ from typing import Any
 
 from django.db import models
 
-
 class RangeField(models.Field):
     empty_strings_allowed: bool = ...
     base_field: Any = ...
@@ -45,4 +44,4 @@ class DateRangeField(RangeField):
     base_field: Any = ...
     range_type: Any = ...
     form_field: Any = ...
-    def db_type(self, connection: Any): ...
+    def db_type(self, connection: Any): ...

django-stubs/contrib/postgres/operations.pyi

@@ -4,22 +4,15 @@ from django.db.backends.sqlite3.schema import DatabaseSchemaEditor
 from django.db.migrations.operations.base import Operation
 from django.db.migrations.state import ProjectState
 
-
 class CreateExtension(Operation):
     reversible: bool = ...
     name: Any = ...
     def __init__(self, name: str) -> None: ...
     def state_forwards(self, app_label: str, state: ProjectState) -> None: ...
     def database_forwards(
-        self,
-        app_label: str,
-        schema_editor: DatabaseSchemaEditor,
-        from_state: ProjectState,
-        to_state: ProjectState,
-    ) -> None: ...
-    def database_backwards(
-        self, app_label: Any, schema_editor: Any, from_state: Any, to_state: Any
+        self, app_label: str, schema_editor: DatabaseSchemaEditor, from_state: ProjectState, to_state: ProjectState
     ) -> None: ...
+    def database_backwards(self, app_label: Any, schema_editor: Any, from_state: Any, to_state: Any) -> None: ...
     def describe(self): ...
 
 class BtreeGinExtension(CreateExtension):