[MINOR] eb-172647-fix-pymetrics-build (#11)

- Add mypy dependencies

setup.py

@@ -21,15 +21,30 @@ def readme():
  return f.read()
 
 
+install_requires = [
+ 'attrs>=17.4,<20',
+ 'conformity>=1.26.9,!=1.27.0,<2.0',
+ 'enum34;python_version<"3.4"',
+ 'six',
+ 'typing~=3.7.4;python_version<"3.5"',
+ 'typing-extensions~=3.7.4;python_version<"3.8"',
+]
+
+mypy_require = [
+ 'mypy~=0.740;python_version>"3.4"',
+ 'types-six~=0.1.7;python_version>"3.4"',
+ 'types-mock~=0.1.3;python_version>"3.4"',
+ ]
+
 tests_require = [
  'freezegun',
  'pytest',
  'pytest-cov',
  'pytest-runner',
  'mock',
  'more-itertools~=5.0', # We must pin this, because 6.0 requires Python 3.
- 'mypy~=0.740;python_version>"3.4"',
-]
+] + mypy_require
+
 
 setup(
  name='pymetrics',
@@ -43,14 +58,7 @@ def readme():
  package_data={str('pymetrics'): [str('py.typed')]}, # PEP 561
  zip_safe=False, # PEP 561
  include_package_data=True,
- install_requires=[
- 'attrs>=17.4,<20',
- 'conformity>=1.26.9,!=1.27.0,<2.0',
- 'enum34;python_version<"3.4"',
- 'six',
- 'typing~=3.7.4;python_version<"3.5"',
- 'typing-extensions~=3.7.4;python_version<"3.8"',
- ],
+ install_requires=install_requires,
  tests_require=tests_require,
  setup_requires=['pytest-runner'] if {'pytest', 'test', 'ptr'}.intersection(sys.argv) else [],
  test_suite='tests',