Type Annotations: core.output

- Resolves Issue #706
    - Related to PR #628

CHANGELOG.md

@@ -40,6 +40,7 @@ Refactoring:
     - `[core.log]` [Issue #703](https://github.com/datafolklabs/cement/issues/703)
     - `[core.mail]` [Issue #704](https://github.com/datafolklabs/cement/issues/704)
     - `[core.meta]` [Issue #705](https://github.com/datafolklabs/cement/issues/705)
+    - `[core.output]` [Issue #706](https://github.com/datafolklabs/cement/issues/706)
     - `[utils.fs]` [Issue #688](https://github.com/datafolklabs/cement/issues/688)
     - `[utils.misc]` [Issue #689](https://github.com/datafolklabs/cement/issues/689)
     - `[utils.shell]` [Issue #690](https://github.com/datafolklabs/cement/issues/690)

cement/core/output.py

@@ -1,6 +1,7 @@
 """Cement core output module."""
 
 from abc import abstractmethod
+from typing import Any, Dict
 from ..core.interface import Interface
 from ..core.handler import Handler
 from ..utils.misc import minimal_logger
@@ -17,7 +18,7 @@ class OutputInterface(Interface):
     :class:`OutputHandler` base class as a starting point.
     """
 
-    class Meta:
+    class Meta(Interface.Meta):
 
         """Handler meta-data."""
 
@@ -25,7 +26,7 @@ class OutputInterface(Interface):
         interface = 'output'
 
     @abstractmethod
-    def render(self, data, *args, **kwargs):
+    def render(self, data: Dict[str, Any], *args: Any, **kwargs: Any) -> str:
         """
         Render the ``data`` dict into output in some fashion.  This function
         must accept both ``*args`` and ``**kwargs`` to allow an application to
@@ -47,4 +48,5 @@ class OutputHandler(OutputInterface, Handler):
 
     """Output handler implementation."""
 
-    pass  # pragma: nocover
+    class Meta(Handler.Meta):
+        pass  # pragma: nocover