update test runs to matrix

.travis.yml

@@ -7,15 +7,23 @@ rvm:
 before_script:
   - gem install bundler -v 1.16.2
   - bundle exec hatchet ci:setup
-  - docker build --pull --tag heroku-python-build-heroku-18 --file $(pwd)/Dockerfile.heroku-18 .
+
+matrix:
+  include:
+    - name: Test Dependencies
+      env: TESTFOLDER=test/run-deps
+    - name: Test Python Versions
+      env: TESTFOLDER=test/run-versions
+    - name: Test Steps
+      env: TESTFOLDER=test/run-features
+script: docker build --pull --tag heroku-python-build-heroku-18 --file $(pwd)/Dockerfile.heroku-18 .
+after_script: docker run --rm -e "STACK=heroku-18" heroku-python-build-heroku-18 bash $TESTFOLDER
+
 jobs:
   include:
   - stage: Bash linting (shellcheck)
     sudo: false
     script: make check
-  - stage: Heroku 18 Test
-    name: Build Heroku 18
-    script: docker run --rm -e "STACK=heroku-18" heroku-python-build-heroku-18 bash $TESTFOLDER
   - stage: Hatchet Integration
     if: branch = master
     name: Run Hatchet
@@ -26,12 +34,5 @@ env:
     - IS_RUNNING_ON_CI=true
     - HATCHET_APP_LIMIT=5
     - HATCHET_DEPLOY_STRATEGY=git
-    - TESTFOLDER=test/run-deps
-    - TESTFOLDER=test/run-versions
-    - TESTFOLDER=test/run-features
-    - CI_NODE_TOTAL=2
     - secure: yjtlPE5FbVxTKnjUy/tZUBgSEf4qADD3QOxtgziuid73S0U/1IEXlMGFULsQzIjtlHKmHeywZqpVVEpthIH4RuT7uoX1Pb7SSM/g0T8fT3VoEFbFK1uYl0oZQbUS4Klxv9tPiumj8if3m6ULEGIz1X0wZcMOC0tMLwVCnwmap0E=
     - secure: ZeFTHWwnpIKE9nAqs88ocmiQh7bKce84lilGm5J23nf3N6V4wNyLwqlkvsM008WGBCaOg9AUx7ZunasT0ANsR5gLP3eV2UUg7ILdRgV2Gy13eNRFheC4PHdN92RqQ3aKoqlIv2K999xlhVjod0NzhkQQXB6PddfQINbuU7ks6As=
-  matrix:
-    - CI_NODE_INDEX=0
-    - CI_NODE_INDEX=1