mypy: Disallow "Any" type in some circumstances

This is only to prevent us from introducing needless problems in the
future.

This change also moves the duplicated mypy configuration into one single
place (setup.cfg).

ci.sh

@@ -57,7 +57,7 @@ if python --version 2>&1 | grep " 3" ; then
   # Verson of "python" binary is 3, do static type analysis. Mypy requires
   # Python 3, that's why we do this only on Python 3.
   pip install -r requirements-dev-py3.txt
-  mypy --py2 --ignore-missing-imports --check-untyped-defs ./*.py ./*/*.py
+  mypy ./*.py ./*/*.py
 fi
 
 # FIXME: We want to add to the coverage report, not overwrite it. How do we do

setup.cfg

@@ -6,3 +6,9 @@ max-line-length = 100
 
 [tool:pytest]
 testpaths = tests
+
+[mypy]
+python_version = 2.7
+disallow_any = unimported,explicit,generics
+ignore_missing_imports = True
+check_untyped_defs = True

test.sh

@@ -26,7 +26,7 @@ function do-tests() {
     # Verson of "python" binary is 3, do static type analysis. Mypy requires
     # Python 3, that's why we do this only on Python 3.
     pip install -r requirements-dev-py3.txt
-    mypy --py2 --ignore-missing-imports --check-untyped-defs ./*.py ./*/*.py
+    mypy ./*.py ./*/*.py
   fi
 
   # Run tests