dropped support for older versions of PHP and Symfony

.travis.yml

@@ -14,31 +14,6 @@ cache:
 
 before_install:
     - phpenv config-rm xdebug.ini
-
-    # Twig 1.x
-    - if [[ $TWIG_VERSION != 2.0 ]]; then sed -i 's/~1.8|~2.0/~1.8/g' composer.json; fi
-
-    # Symfony 2.8
-    - if [[ $SYMFONY_DEPS_VERSION = 2.8 ]]; then sed -i 's/~2\.8|^3\.0/2.8.*/g' composer.json; fi
-    # Symfony 3.3
-    - |
-      if [[ $SYMFONY_DEPS_VERSION = 3.3 ]]; then
-          sed -i 's/~2\.8|^3\.0/3.3.*/g' composer.json;
-          composer require --no-update symfony/web-link:3.3.*
-      fi
-    # Symfony 3.4
-    - |
-      if [[ $SYMFONY_DEPS_VERSION = 3.4 ]]; then
-          sed -i 's/~2\.8|^3\.0/3.4.*/g' composer.json;
-          composer require --no-update symfony/web-link:3.4.*
-      fi
-    # Symfony 4.0
-    - |
-      if [[ $SYMFONY_DEPS_VERSION = 4.0 ]]; then
-          sed -i 's/~2\.8|^3\.0/4.0.*/g' composer.json;
-          composer require --no-update symfony/web-link:4.0.*
-      fi
-
     - composer update --no-suggest
 
 install:
@@ -48,18 +23,5 @@ script: ./vendor/bin/simple-phpunit
 
 matrix:
     include:
-        - php: 5.5
-        - php: 5.6
-          env: TWIG_VERSION=2.0
-        - php: 5.6
-          env: SYMFONY_DEPS_VERSION=2.8
-        - php: 5.6
-          env: SYMFONY_DEPS_VERSION=3.3
-        - php: 5.6
-          env: SYMFONY_DEPS_VERSION=3.4
-        - php: 7.2
-          env: SYMFONY_DEPS_VERSION=4.0
-        - php: 5.6
-        - php: 7.0
         - php: 7.1
         - php: 7.2

composer.json

@@ -15,43 +15,40 @@
         }
     ],
     "require": {
-        "php": ">=5.5.9",
-        "pimple/pimple": "~3.0",
-        "symfony/event-dispatcher": "~2.8|^3.4|^4.0",
-        "symfony/http-foundation": "~2.8|^3.4|^4.0",
-        "symfony/http-kernel": "~2.8|^3.4|^4.0",
-        "symfony/routing": "~2.8|^3.4|^4.0"
+        "php": ">=7.1.3",
+        "pimple/pimple": "^3.0",
+        "symfony/event-dispatcher": "^4.0",
+        "symfony/http-foundation": "^4.0",
+        "symfony/http-kernel": "^4.0",
+        "symfony/routing": "^4.0"
     },
     "require-dev": {
-        "symfony/asset": "~2.8|^3.4|^4.0",
-        "symfony/expression-language": "~2.8|^3.4|^4.0",
-        "symfony/security": "~2.8|^3.4|^4.0",
-        "symfony/config": "~2.8|^3.4|^4.0",
-        "symfony/form": "~2.8|^3.4|^4.0",
-        "symfony/browser-kit": "~2.8|^3.4|^4.0",
-        "symfony/css-selector": "~2.8|^3.4|^4.0",
-        "symfony/debug": "~2.8|^3.4|^4.0",
-        "symfony/dom-crawler": "~2.8|^3.4|^4.0",
-        "symfony/finder": "~2.8|^3.4|^4.0",
-        "symfony/intl": "~2.8|^3.4|^4.0",
-        "symfony/monolog-bridge": "~2.8|^3.4|^4.0",
-        "symfony/doctrine-bridge": "~2.8|^3.4|^4.0",
-        "symfony/options-resolver": "~2.8|^3.4|^4.0",
+        "symfony/asset": "^4.0",
+        "symfony/expression-language": "^4.0",
+        "symfony/security": "^4.0",
+        "symfony/config": "^4.0",
+        "symfony/form": "^4.0",
+        "symfony/browser-kit": "^4.0",
+        "symfony/css-selector": "^4.0",
+        "symfony/debug": "^4.0",
+        "symfony/dom-crawler": "^4.0",
+        "symfony/finder": "^4.0",
+        "symfony/intl": "^4.0",
+        "symfony/monolog-bridge": "^4.0",
+        "symfony/doctrine-bridge": "^4.0",
+        "symfony/options-resolver": "^4.0",
         "symfony/phpunit-bridge": "^3.2",
-        "symfony/process": "~2.8|^3.4|^4.0",
-        "symfony/serializer": "~2.8|^3.4|^4.0",
-        "symfony/translation": "~2.8|^3.4|^4.0",
-        "symfony/twig-bridge": "~2.8|^3.4|^4.0",
-        "symfony/validator": "~2.8|^3.4|^4.0",
-        "symfony/var-dumper": "~2.8|^3.4|^4.0",
-        "twig/twig": "~1.30|~2.0",
-        "doctrine/dbal": "~2.2",
-        "swiftmailer/swiftmailer": "~5",
+        "symfony/process": "^4.0",
+        "symfony/serializer": "^4.0",
+        "symfony/translation": "^4.0",
+        "symfony/twig-bridge": "^4.0",
+        "symfony/validator": "^4.0",
+        "symfony/var-dumper": "^4.0",
+        "twig/twig": "^2.0",
+        "doctrine/dbal": "^2.2",
+        "swiftmailer/swiftmailer": "^5",
         "monolog/monolog": "^1.4.1",
-        "symfony/web-link": "^3.4|^4.0"
-    },
-    "conflict": {
-        "phpunit/phpunit": "<4.8.35 || >= 5.0, <5.4.3"
+        "symfony/web-link": "^4.0"
     },
     "replace": {
         "silex/api": "self.version",

doc/changelog.rst

@@ -9,6 +9,9 @@ Changelog
  * allow setting custom status code on exception response with Symfony 3.3+
  * made CSRF extension work with Validator translations domain
  * fixed Security provider context usage
+ * dropped support for Twig < 2.0
+ * dropped support for PHP < 7.1
+ * dropped support for Symfony 2.x and 3.x
  * added support for Symfony 4
 
 2.2.3 (2018-02-25)