Upgrade dependencies

requirements_test.txt

@@ -1,25 +1,24 @@
 voluptuous==0.11.7
-PyYAML==5.2
+PyYAML==5.3.1
 paho-mqtt==1.5.0
-colorlog==4.0.2
-tornado==5.1.1
-protobuf==3.11.1
+colorlog==4.1.0
+tornado==6.0.4
+protobuf==3.11.3
 tzlocal==2.0.0
-pytz==2019.3
+pytz==2020.1
 pyserial==3.4
 ifaddr==0.1.6
-platformio==4.1.0
-esptool==2.7
+platformio==4.3.3
+esptool==2.8
 
-pylint==1.9.4 ; python_version<"3"
-pylint==2.4.4 ; python_version>"3"
+pylint==2.5.0
 flake8==3.7.9
 pillow
 pexpect
 
 # Unit tests
-pytest==5.3.2
+pytest==5.4.1
 pytest-cov==2.8.1
 pytest-mock==1.13.0
 asyncmock==0.4.2
-hypothesis==4.57.0
+hypothesis==5.10.4