fix mypy

Author: rmorshea

requirements/check-types.txt

@@ -1 +1,5 @@
 mypy
+types-click
+types-tornado
+types-pkg-resources
+types-flask

src/idom/cli.py

@@ -22,7 +22,7 @@ def root(
         show_default=False,
         is_eager=True,
     )
-):
+) -> None:
     """Command line interface for IDOM"""
 
     # reset logging config after Typer() has wrapped stdout
@@ -31,6 +31,8 @@ def root(
     if version:
         typer.echo(idom.__version__)
 
+    return None
+
 
 @main.command()
 def install(packages: List[str]) -> None:

src/idom/testing.py

@@ -174,8 +174,9 @@ def __init__(self) -> None:
         self.records: List[logging.LogRecord] = []
         super().__init__()
 
-    def handle(self, record: logging.LogRecord) -> None:
+    def handle(self, record: logging.LogRecord) -> bool:
         self.records.append(record)
+        return True
 
 
 class HookCatcher: