Run mypy with tox (jpadilla#421)

Author: jpadilla

.travis.yml

@@ -6,20 +6,16 @@ matrix:
     - python: 3.4
       env: TOXENV=flake8,py34-crypto,py34-nocrypto
     - python: 3.5
-      env: TOXENV=flake8,py35-crypto,py35-nocrypto,py35-contrib_crypto
+      env: TOXENV=flake8,mypy,py35-crypto,py35-nocrypto,py35-contrib_crypto
     - python: 3.6
-      env: TOXENV=flake8,py36-crypto,py36-nocrypto,py36-contrib_crypto
+      env: TOXENV=flake8,mypy,py36-crypto,py36-nocrypto,py36-contrib_crypto
     - python: 3.7
-      env: TOXENV=flake8,py37-crypto,py37-nocrypto,py37-contrib_crypto
+      env: TOXENV=flake8,mypy,py37-crypto,py37-nocrypto,py37-contrib_crypto
       dist: xenial
-before_install:
-  - sudo apt-get install python3-pip # required to install mypy
 install:
   - pip install -U pip
   - pip install -U tox coveralls
-  - sudo python3 -m pip install -U mypy # python3.4+ required to run mypy
 script:
   - tox
-  - mypy --ignore-missing-imports jwt
 after_success:
   - coveralls

setup.py

@@ -77,6 +77,9 @@ def get_version(package):
             'flake8',
             'flake8-import-order',
             'pep8-naming'
+        ],
+        mypy=[
+            'mypy'
         ]
     ),
     entry_points={

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,34,35,36,37}-crypto, py{27,35,36,37}-contrib_crypto, py{27,35,36,37}-nocrypto, flake8
+envlist = py{27,34,35,36,37}-crypto, py{27,35,36,37}-contrib_crypto, py{27,35,36,37}-nocrypto, flake8, mypy
 
 [testenv]
 commands =
@@ -14,3 +14,8 @@ extras = test
 commands =
     flake8
 extras = flake8
+
+[testenv:mypy]
+commands =
+    mypy --ignore-missing-imports jwt
+extras = mypy