Fix pylint deps warnings

Signed-off-by: Aleksei Stepanov <penguinolog@gmail.com>

Author: penguinolog

.travis.yml

@@ -59,7 +59,7 @@ jobs:
     install:
     - *upgrade_python_toolset
     - *install_deps
-    - pip install --upgrade "pylint > 2.2"
+    - pip install --upgrade "pylint > 2.3" isort[pyproject,requirements]
     script:
     - pylint advanced_descriptors
   - <<: *static_analysis

azure-pipelines.yml

@@ -16,7 +16,7 @@ jobs:
       python -m pip install --upgrade pip
       pip install -U setuptools
       pip install -r requirements.txt
-      pip install -U pytest pylint pytest-sugar pytest-flake8 flake8-bugbear flake8-docstrings
+      pip install -U pytest pytest-sugar pytest-flake8 flake8-bugbear flake8-docstrings
     displayName: 'Install dependencies'
 
   - script: |
@@ -43,7 +43,7 @@ jobs:
       python -m pip install --upgrade pip
       pip install -U setuptools
       pip install -r requirements.txt
-      pip install -U pytest pylint pytest-pylint pytest-sugar
+      pip install -U pytest pylint pytest-pylint pytest-sugar isort[pyproject,requirements]
     displayName: 'Install dependencies'
 
   - script: |

tox.ini

@@ -64,7 +64,8 @@ commands = pip install ./ -vvv -U
 
 [testenv:pylint]
 deps =
-    pylint>2.2
+    pylint>2.3
+    isort[pyproject,requirements]
     -r{toxinidir}/CI_REQUIREMENTS.txt
 commands = pylint advanced_descriptors