Upgrade flake8 and pytype

Author: seratch

scripts/run_flake8.sh

@@ -3,5 +3,5 @@
 
 script_dir=$(dirname $0)
 cd ${script_dir}/.. && \
-  pip install "flake8==5.0.3" && \
+  pip install "flake8==5.0.4" && \
   flake8 slack_bolt/ && flake8 examples/

scripts/run_pytype.sh

@@ -5,5 +5,5 @@ script_dir=$(dirname $0)
 cd ${script_dir}/.. && \
   pip install -e ".[async]" && \
   pip install -e ".[adapter]" && \
-  pip install "pytype==2022.7.26" && \
+  pip install "pytype==2022.8.23" && \
   pytype slack_bolt/