Disabled deprecated warnings for PHP 7.3 tests (#16997)

.travis.yml

@@ -61,6 +61,8 @@ addons:
 matrix:
   fast_finish: true
   include:
+    - php: 7.3
+
     - php: 7.2
 
     # run tests coverage on PHP 7.1
@@ -204,7 +206,7 @@ before_script:
   # Disable DEPRECATE messages during PHPUnit initialization on PHP 7.2. To fix them, PHPUnit should be updated to 6.*
   # For Yii2 tests, messages will be enabled by tests/bootstrap.php
   - |
-    if [[ $TRAVIS_PHP_VERSION == 7.2 || $TRAVIS_PHP_VERSION = nightly ]]; then
+    if [[ $TRAVIS_PHP_VERSION == 7.2 || $TRAVIS_PHP_VERSION == 7.3 || $TRAVIS_PHP_VERSION = nightly ]]; then
       echo 'Disabled DEPRECATED notifications for PHP >= 7.2';
       echo 'error_reporting = E_ALL & ~E_DEPRECATED' >> /tmp/php-config.ini;
       phpenv config-add /tmp/php-config.ini;