Upgrade pylint and pytest to be compatible with Python 3.8

Author: Photonios

requirements-dev.txt

@@ -1,6 +1,6 @@
 flake8==3.4.1
-pytest==3.10.0
-pytest-cov==2.6.0
+pytest==5.4.3
+pytest-cov==2.10.0
 docker-py==1.10.6
 coveralls==1.5.1
 Sphinx==1.6.4
@@ -9,8 +9,8 @@ xxhash==1.3.0
 python-snappy==0.5.3
 tox==3.5.3
 mock==3.0.5
-pylint==1.9.3
-pytest-pylint==0.12.3
+pylint==2.5.3
+pytest-pylint==0.17.0
 pytest-mock==1.10.0
 sphinx-rtd-theme==0.2.4
 crc32c==1.7

tox.ini

@@ -8,7 +8,7 @@ log_format = %(created)f %(filename)-23s %(threadName)s %(message)s
 
 [testenv]
 deps =
-    pytest<4.0
+    pytest
     pytest-cov
     py{27,34,35,36,37,38,py}: pylint
     py{27,34,35,36,37,38,py}: pytest-pylint