Merge remote-tracking branch 'upstream/master' into feature_layout

Author: tsu1980

.travis.yml

@@ -1,11 +1,15 @@
 language: php
 
-php:
-  - 5.5
-  - 5.6
-  - 7.0
-  - hhvm
+matrix:
+  include:
+  - php: 7.1
+    env: ANALYSIS='true'
+  - php: 7.2
+  - php: 7.3
+  - php: nightly
+  allow_failures:
+  - php: nightly
 
 before_script: composer install
 
-script: phpunit --coverage-text --configuration phpunit.xml.dist
+script: phpunit --coverage-text --configuration phpunit.xml.dist