minor #154 Update CI configuration (phansys)

This PR was merged into the master branch.

Discussion
----------

* Stop building on `hhvm`
* Build on `php:7.4snapshot`
* Build with `symfony/symfony:^4.4@dev`

Commits
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c109dee Update CI configuration

Author: phansys

.travis.yml

@@ -7,8 +7,8 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4snapshot
   - nightly
-  - hhvm
 
 env:
   global:
@@ -33,11 +33,11 @@ matrix:
       env: INSTALL_VICH_UPLOADER_BUNDLE=true SYMFONY_PHPUNIT_VERSION="5.7.27"
     - php: 7.2
     - php: 7.3
-      env: SYMFONY_VERSION="^4.3@dev" SYMFONY_PHPUNIT_VERSION="7.4.4"
+      env: SYMFONY_VERSION="^4.4@dev" SYMFONY_PHPUNIT_VERSION="7.4.4"
   allow_failures:
+    - php: 7.4snapshot
     - php: nightly
-    - php: hhvm
-    - env: SYMFONY_VERSION="^4.3@dev" SYMFONY_PHPUNIT_VERSION="7.4.4"
+    - env: SYMFONY_VERSION="^4.4@dev" SYMFONY_PHPUNIT_VERSION="7.4.4"
 
 sudo: false