Merge remote-tracking branch 'origin/master'

requirements-test.txt

 pip
 setuptools
 wheel
-future==0.17.1
-ecdsa==0.13.2
-requests==2.22.0
-websocket-client==0.56.0
-pytz==2019.2
-pycryptodomex==3.9.0
+future==0.18.2
+ecdsa==0.15
+requests==2.23.0
+websocket-client==0.57.0
+pytz==2019.3
+pycryptodomex==3.9.7
 scrypt==0.8.13
 Events==0.3
-cryptography==2.7
+cryptography==2.8
 pyyaml>=4.2b1
-mock==3.0.5
+mock==4.0.2
 appdirs==1.4.3
-Click==7.0
+Click==7.1.1
 prettytable
 pycodestyle==2.5.0
 pyflakes==2.1.1
 pylibscrypt==1.8.0
-six==1.12.0
+six==1.14.0
 pytest
 pytest-mock
 pytest-cov