Switch to using GitHub Actions instead of Travis CI

Travis CI has made some recent changes that result in slower results.
This switches to using GitHub's new actions workflow instead.

.coveragerc

@@ -1,3 +1,5 @@
 [paths]
 source = .
         /lorax/
+[run]
+relative_files = True

.github/workflows/tests.yml

@@ -0,0 +1,28 @@
+name: Tests and Coverage
+# Make sure only one action triggers the job, otherwise pushing to a
+# pull-request will run it twice.
+on:
+  pull_request:
+    branches:
+      - "*"
+  push:
+    branches:
+      - master
+      - rhel8-branch
+      - rhel7-branch
+      - f31-branch
+      - f32-branch
+      - f33-branch
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Clone Repository"
+        uses: actions/checkout@v2
+      - name: Run lorax tests in podman
+        run: make test-in-docker && cp .test-results/.coverage .coverage
+      - name: Coveralls
+        uses: AndreMiras/coveralls-python-action@develop
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.travis.yml

@@ -1,24 +0,0 @@
-sudo: required
-language: python
-services:
-  - docker
-
-env:
-  - DOCKER=docker
-
-script:
-  - make test-in-docker
-
-after_success:
-  - |
-
-        cp .test-results/.coverage ./.coverage.docker
-
-        pip install coverage coveralls
-        coverage combine
-        coveralls
-
-notifications:
-  email:
-    on_failure: change
-    on_success: never