Remove support for expired Symfony versions

Author: curry684

.travis.yml

@@ -23,8 +23,6 @@ matrix:
        env: COMPOSER_FLAGS="--prefer-lowest"
      - php: 7.2
        env: SYMFONY_VERSION=^3.4
-     - php: 7.3
-       env: SYMFONY_VERSION=^3.3
      - php: 7.3
        env: SYMFONY_VERSION=^3.4
      - php: 7.3

composer.json

@@ -21,9 +21,9 @@
     },
     "require": {
         "php": "^7.0.8",
-        "symfony/framework-bundle": "^3.3|^4.0",
-        "symfony/property-access": "^3.0|^4.0",
-        "symfony/translation": "^3.2|^4.0"
+        "symfony/framework-bundle": "^3.4|^4.1",
+        "symfony/property-access": "^3.4|^4.1",
+        "symfony/translation": "^3.4|^4.1"
     },
     "require-dev": {
         "ext-pdo_sqlite": "*",
@@ -34,14 +34,14 @@
         "mongodb/mongodb": "^1.2",
         "phpunit/phpunit": "^6.1|^7.1",
         "ruflin/elastica": "^6.0",
-        "symfony/browser-kit": "^3.0|^4.0",
-        "symfony/css-selector": "^3.0|^4.0",
-        "symfony/dom-crawler": "^3.0|^4.0",
-        "symfony/phpunit-bridge": "^3.3|^4.0",
-        "symfony/templating": "^3.0|^4.0",
-        "symfony/twig-bundle": "^3.3|^4.0",
-        "symfony/var-dumper": "^3.0|^4.0",
-        "symfony/yaml": "^3.3|^4.0"
+        "symfony/browser-kit": "^3.4|^4.1",
+        "symfony/css-selector": "^3.4|^4.1",
+        "symfony/dom-crawler": "^3.4|^4.1",
+        "symfony/phpunit-bridge": "^3.4|^4.1",
+        "symfony/templating": "^3.4|^4.1",
+        "symfony/twig-bundle": "^3.4|^4.1",
+        "symfony/var-dumper": "^3.4|^4.1",
+        "symfony/yaml": "^3.4|^4.1"
     },
     "suggest": {
         "doctrine/doctrine-bundle": "For integrated access to Doctrine object managers",