Merge remote-tracking branch 'origin/master'

Author: wol-soft

.travis.yml

@@ -5,6 +5,8 @@ sudo: false
 php:
   - 7.1
   - 7.2
+  - 7.3
+  - 7.4snapshot
 
 install:
   # Install coveralls.phar
@@ -27,4 +29,4 @@ after_success:
 cache:
   directories:
     - vendor
-    - $COMPOSER_CACHE_DIR
+    - $COMPOSER_CACHE_DIR