Run tests on PHP 7.4 and simplify test matrix

Author: SimonFrings

.travis.yml

@@ -1,22 +1,23 @@
 language: php
 
-php:
-# - 5.3 # requires old distro, see below
-  - 5.4
-  - 5.5
-  - 5.6
-  - 7
-  - hhvm # ignore errors, see below
-
 # lock distro so new future defaults will not break the build
 dist: trusty
 
 matrix:
   include:
     - php: 5.3
       dist: precise
+    - php: 5.4
+    - php: 5.5
+    - php: 5.6
+    - php: 7.0
+    - php: 7.1
+    - php: 7.2
+    - php: 7.3
+    - php: 7.4
+    - php: hhvm-3.18
   allow_failures:
-    - php: hhvm
+    - php: hhvm-3.18
 
 sudo: false
 

composer.json

@@ -23,7 +23,7 @@
         "ringcentral/psr7": "^1.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.0 || ^4.8",
+        "phpunit/phpunit": "^7.0 || ^5.0 || ^4.8",
         "react/event-loop": "^1.0 || ^0.5 || ^0.4 || ^0.3",
         "clue/block-react": "^1.1"
     }