tox: mypy checking for entire codebase

Also fix a few linting errors.

mitmproxy/tools/console/palettes.py

@@ -1,4 +1,4 @@
-import typing
+import typing  # noqa
 # Low-color themes should ONLY use the standard foreground and background
 # colours listed here:
 #

setup.cfg

@@ -37,7 +37,7 @@ exclude =
     mitmproxy/controller.py
     mitmproxy/export.py
     mitmproxy/flow.py
-    mitmproxy/io_compat.py
+    mitmproxy/io/compat.py
     mitmproxy/master.py
     pathod/pathoc.py
     pathod/pathod.py
@@ -57,8 +57,9 @@ exclude =
     mitmproxy/exceptions.py
     mitmproxy/export.py
     mitmproxy/flow.py
-    mitmproxy/io.py
-    mitmproxy/io_compat.py
+    mitmproxy/io/io.py
+    mitmproxy/io/compat.py
+    mitmproxy/io/tnetstring.py
     mitmproxy/log.py
     mitmproxy/master.py
     mitmproxy/net/check.py

tox.ini

@@ -27,17 +27,7 @@ commands =
   flake8 --jobs 8 mitmproxy pathod examples test release
   python3 test/filename_matching.py
   rstcheck README.rst
-  mypy --ignore-missing-imports --follow-imports=skip \
-    mitmproxy/addons/ \
-    mitmproxy/addonmanager.py \
-    mitmproxy/optmanager.py \
-    mitmproxy/proxy/protocol/ \
-    mitmproxy/log.py \
-    mitmproxy/tools/dump.py \
-    mitmproxy/tools/web/ \
-    mitmproxy/contentviews/
-  mypy --ignore-missing-imports \
-    mitmproxy/master.py
+  mypy --ignore-missing-imports ./mitmproxy
 
 [testenv:individual_coverage]
 deps =