Add Symfony 4.1, 4.2 and php nightly to the CI

.travis.yml

@@ -3,29 +3,31 @@ language: php
 services:
   - redis-server
 
-php:
-  - 5.4
-  - 5.5
-  - 5.6
-  - 7.0
-  - 7.1
-  - 7.2
-  - hhvm
-
 matrix:
   include:
+    - php: 5.4
+    - php: 5.5
+    - php: 5.6
     - php: 5.6
       env: SYMFONY_VERSION="2.7.*" SYMFONY_DEPRECATIONS_HELPER="weak"
     - php: 5.6
       env: SYMFONY_VERSION="2.8.*"
     - php: 5.6
       env: SYMFONY_VERSION="3.0.*"
+    - php: 7.0
+    - php: 7.1
     - php: 7.1
       env: SYMFONY_VERSION="4.0.*"
+    - php: 7.2
     - php: 7.2
       env: SYMFONY_VERSION="4.0.*"
+    - php: 7.2
+      env: SYMFONY_VERSION="4.2.*" SYMFONY_DEPRECATIONS_HELPER="weak" STABILITY="dev"
+    - php: nightly
   allow_failures:
     - php: hhvm
+    - php: nightly
+    - env: SYMFONY_VERSION="4.2.*" SYMFONY_DEPRECATIONS_HELPER="weak" STABILITY="dev"
 
 sudo: false
 
@@ -42,6 +44,7 @@ before_install:
   - if [[ $TRAVIS_PHP_VERSION != hhvm ]]; then echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi;
   - if [[ $TRAVIS_PHP_VERSION != hhvm ]]; then phpenv rehash; fi;
   - composer self-update
+  - if ! [ -z "$STABILITY" ]; then composer config minimum-stability ${STABILITY}; fi;
   - if [ "$SYMFONY_VERSION" != "" ]; then composer require --no-update symfony/symfony:${SYMFONY_VERSION}; fi;
 
 install: composer update