Another fix to travis config.

.travis.yml

@@ -4,11 +4,9 @@ services:
   - postgresql
 
 python:
-  - "3.6"
   - "3.7"
-  - "3.8"
 
-before_script:
+before_install:
   - cp config/travis-testing.py config/testing.py
   - psql -c 'create database crc_test;' -U postgres
 
@@ -16,6 +14,3 @@ install:
   - pip install pipenv pytest
   - pipenv install
   - pytest              # <== This runs in Pipenv (a/k/a virtualenv)
-# command to run tests
-script:
-  - pytest