Bumpy mypy versions (#28)

* Update test-requirements

* Update order of overloads for correct matching

* Test Python 3.7 as well

* Ignore .egg-info for editable pip install

* Use black to autoformat numpy-stubs

* Fix Python 3.7 build

Author: Alan Du

.gitignore

@@ -1,3 +1,4 @@
 .mypy_cache
 .pytest_cache
 __pycache__
+numpy_stubs.egg-info/

.travis.yml

@@ -1,5 +1,10 @@
 language: python
-python: 3.6
+matrix:
+  include:
+    - python: 3.7
+      dist: xenial
+      sudo: true
+    - python: 3.6
 
 notifications:
   email: false
@@ -10,6 +15,7 @@ install:
 
 script:
 - flake8
+- black --check numpy-stubs
 - py.test
 
 cache: