updates to travis build setup

Author: bhavani105

.travis.yml

@@ -1,10 +1,17 @@
+dist: focal
 language: python
+vm:
+  size: large
 python:
   - "3.7"
   - "3.8"
   - "3.9"
 cache: pip
-install: pip install tox-travis
+before_install:
+  - pip install --upgrade pip
+install: 
+  - python3 -V
+  - pip install tox-travis
 script:
   - tox -r
   - >

setup.py

@@ -27,6 +27,7 @@
 ]
 
 _deps = {
+    "docutils>=0.14,<0.18": ["tests"],
     "bitarray~=2.3.7": ["install"],
     "bump2version~=1.0.1": ["dev"],
     "click~=8.0.4": ["install"],

tox.ini

@@ -1,8 +1,10 @@
 [tox]
 envlist = py37,py38,py39
+tox_pip_extensions_ext_venv_update = true
 
 [testenv]
 # install pytest in the virtualenv where commands will be executed
 extras = tests
+
 commands =
-    pytest --cov primeqa --cov-config .coveragerc --cov-fail-under=60 tests/
+    pytest --cov primeqa --cov-config .coveragerc --cov-fail-under=60 tests/