Update pip_requirements_dev.txt

lowaa · web-flow · commit 10032691807a · 2020-01-08T14:33:14.000+08:00
pinning dependencies
diff --git a/pip_requirements_dev.txt b/pip_requirements_dev.txt
@@ -2,11 +2,11 @@
 -r pip_requirements_prod.txt
 
 # dev related stuff
-flake8
-pylint
-pyhamcrest
-mock
-watchdog
-pynt
-pexpect
-pytest
+flake8==3.7.7
+pylint==2.3.1
+pyhamcrest==1.9.0
+mock==2.0.0
+watchdog==0.9.0
+pynt==0.8.2
+pexpect==4.7.0
+pytest==4.4.2
