Bumped dependencies to more secure versions. by: Giles

Author: gpjt

requirements.txt

@@ -1,20 +1,20 @@
-certifi==2018.10.15
+certifi==2019.3.9
 chardet==3.0.4
 cookies==2.2.1
 coverage==4.5.1
 docopt==0.6.2
-idna==2.6
+idna==2.8
 pbr==5.1.0
 psutil==5.4.0
 py==1.7.0
 pytest==3.2.3
 pytest-cov==2.6.0
 python-dateutil==2.7.5
-requests==2.18.4
+requests==2.22.0
 responses==0.8.1
 six==1.11.0
 stevedore==1.30.0
-urllib3==1.22
+urllib3==1.25.2
 virtualenv==16.0.0
 virtualenv-clone==0.4.0
 virtualenvwrapper==4.8.2