trigger test for py34

requirements_dev.txt

@@ -1,10 +1,10 @@
-bump2version==0.5.11
-wheel==0.33.6
-watchdog==0.9.0
-flake8==3.7.8
-tox==3.14.0
-coverage==4.5.4
-Sphinx==1.8.5
-twine==1.14.0
-pytest==4.6.5
-pytest-runner==5.1
+bump2version
+wheel
+watchdog
+flake8
+tox
+coverage
+Sphinx
+twine
+pytest
+pytest-runner