fix: Added missing type annotations

Author: dylan-robins

src/cleo/io/output_handler.py

@@ -27,7 +27,7 @@ def __init__(self, output: Output):
         super().__init__()
         self.output = output
 
-    def emit(self, record: logging.LogRecord):
+    def emit(self, record: logging.LogRecord) -> None:
         """
         Emit a record.
 

tests/fixtures/foo4_command.py

@@ -7,7 +7,7 @@
 from cleo.commands.command import Command
 
 
-def log_stuff():
+def log_stuff() -> None:
     logging.debug("This is an debug log record")
     logging.info("This is an info log record")
     logging.warning("This is an warning log record")