Updated requirements_dev.txt

requirements_dev.txt

@@ -1,18 +1,18 @@
 pip==18.1
 bump2version==0.5.10
-wheel==0.32.2
+wheel==0.32.3
 watchdog==0.9.0
 flake8==3.6.0
 tox==3.5.3
 coverage==4.5.2
 Sphinx==1.8.2
-cryptography==2.4.1
+cryptography==2.4.2
 PyYAML==4.2b4
-pytest==4.0.0
+pytest==4.0.1
 pytest-runner>=4.2
-cython==0.29
+cython==0.29.1
 numpy==1.15.4
 scikit-learn==0.19.1
 scipy==1.1.0
 click==7.0
-mypy==0.641
+mypy==0.650