Switched to travis for CI

.github/workflows/test-suite.yaml

@@ -1,31 +0,0 @@
-name: Directory Lister Test Suite
-on: [push]
-
-jobs:
-  unit-tests:
-    name: Unit Tests
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout Repository
-        uses: actions/checkout@v2
-
-      - name: Get Composer Cache Directory
-        id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
-
-      - name: Cache PHP Dependencies
-        uses: actions/cache@v1
-        with:
-          path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
-          restore-keys: ${{ runner.os }}-composer-
-
-      - name: Validate Composer Files
-        run: composer validate
-
-      - name: Install PHP Dependencies
-        run: composer install --prefer-dist --no-progress --no-suggest
-
-      - name: Run Tests
-        run: vendor/bin/phpunit --coverage-text
-

.travis.yml

@@ -0,0 +1,27 @@
+sudo: false
+
+language: php
+
+php:
+  - 7.3
+  - 7.4
+  - nightly
+
+matrix:
+  allow_failures:
+    - php: nightly
+
+cache:
+  directories:
+    - $HOME/.composer/cache
+    - vendor
+
+before_install: phpenv config-rm xdebug.ini || true
+
+install: composer install
+
+before_script:
+  - vendor/bin/php-cs-fixer fix --diff --dry-run
+  - vendor/bin/psalm
+
+script: vendor/bin/phpunit --coverage-text