Travis config update, remove branch aliases

.travis.yml

@@ -1,19 +1,21 @@
 language: php
 
-dist: trusty
+dist: xenial
+
+services:
+  - mysql
+  - postgresql
 
 matrix:
   include:
-    - php: '5.6'
-      env: DB=MYSQL RECIPE_VERSION=4.3.x-dev PHPCS_TEST=1 PHPUNIT_TEST=1
-    - php: '7.0'
-      env: DB=MYSQL RECIPE_VERSION=4.3.x-dev PHPUNIT_TEST=1
     - php: '7.1'
-      env: DB=PGSQL RECIPE_VERSION=4.4.x-dev PHPUNIT_COVERAGE_TEST=1
+      env: DB=MYSQL PHPCS_TEST=1 PHPUNIT_TEST=1
+    - php: '7.1'
+      env: DB=PGSQL PHPUNIT_COVERAGE_TEST=1
     - php: '7.2'
-      env: DB=MYSQL RECIPE_VERSION=4.5.x-dev PHPUNIT_TEST=1
+      env: DB=MYSQL PHPUNIT_TEST=1
     - php: '7.3'
-      env: DB=MYSQL RECIPE_VERSION=4.x-dev PHPUNIT_TEST=1
+      env: DB=MYSQL PHPUNIT_TEST=1
 
 before_script:
   # Init PHP
@@ -22,9 +24,9 @@ before_script:
 
   # Install composer dependencies
   - composer validate
-  - composer require --no-update silverstripe/recipe-cms $RECIPE_VERSION
-  - if [[ $DB == PGSQL ]]; then composer require --no-update silverstripe/postgresql 2.x-dev; fi
-  - composer install --prefer-dist --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile
+  - composer require --no-update silverstripe/recipe-cms:^4
+  - if [[ $DB == PGSQL ]]; then composer require --no-update silverstripe/postgresql:^2; fi
+  - composer install --prefer-source --no-interaction --no-progress --no-suggest --optimize-autoloader --verbose --profile
 
 script:
   - if [[ $PHPUNIT_TEST ]]; then vendor/bin/phpunit; fi

composer.json

@@ -30,10 +30,7 @@
         "expose": [
             "css",
             "javascript"
-        ],
-        "branch-alias": {
-            "dev-master": "2.x-dev"
-        }
+        ]
     },
     "minimum-stability": "dev",
     "prefer-stable": true