Attempt to fix test runs on Azure pipelines

Also:
- Build for some newer versions of Python on TravisCI and AzurePipelines
- Add setup.cfg to make it easier to run flake8 and/or isort

Author: tleonhardt

.travis.yml

@@ -14,12 +14,17 @@ matrix:
           python: 3.6
           env: TOXENV=py36
         - os: linux
-          python: 3.7-dev
+          python: 3.7
+          dist: xenial
           env: TOXENV=py37
         - os: linux
-          python: 3.8-dev
+          python: 3.8
           dist: xenial
           env: TOXENV=py38
+        - os: linux
+            python: 3.9-dev
+            dist: xenial
+            env: TOXENV=py39
 #        # Warning: Don't try to use code coverage analysis with pypy as it is insanely slow
 #        - os: linux
 #          python: pypy3

Pipfile

@@ -12,12 +12,13 @@ typing = {version = "*",markers = "python_version < '3.5'"}
 tableformatter = {editable = true,path = "."}
 colorama = "*"
 colored = "*"
+cmd2 = "*"
 flake8 = "*"
 invoke = "*"
 ipython = "*"
+isort = "*"
+numpy = "*"
+pandas = "*"
 pytest = "*"
 pytest-cov = "*"
 twine = ">=1.11"
-cmd2 = "*"
-numpy = "*"
-pandas = "*"

azure-pipelines.yml

@@ -9,7 +9,7 @@ jobs:
 
   # Configure Build Environment to use Azure Pipelines to build tableformatter Python project using macOS
   pool:
-    vmImage: 'macOS 10.13'  # other options 'Ubuntu 16.04', 'VS2017-Win2016'
+    vmImage: 'macOS-latest'
 
   # Run the pipeline with multiple Python versions
   strategy:
@@ -20,6 +20,8 @@ jobs:
         python.version: '3.6'
       Python37:
         python.version: '3.7'
+      Python38:
+        python.version: '3.8'
     # Increase the maxParallel value to simultaneously run the job for all versions in the matrix (max 10 for free open-source)
     maxParallel: 3
 

setup.cfg

@@ -0,0 +1,11 @@
+[flake8]
+exclude = .git,.idea,.pytest_cache,.tox,.venv,.vscode,build,tableformatter.egg-info,dist,htmlcov,__pycache__,*.egg
+max-line-length = 127
+max-complexity = 26
+
+[isort]
+line_length=127
+multi_line_output = 3
+include_trailing_comma = true
+force_grid_wrap = 0
+use_parentheses = true