Adds an install step

.travis.yml

@@ -4,9 +4,12 @@ python:
   - "3.7"
 
 services:
-  - postgresql
   - docker
 
+install:
+  - sudo pip install --upgrade pip
+  - export PATH=$PATH:$HOME/.local/bin
+
 deploy:
   provider: script
   script: bash deploy.sh