Drop php70 compat

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 7.0
   - 7.1
   - 7.2
   - 7.3

composer.json

@@ -18,7 +18,7 @@
         }
     ],
     "require": {
-        "php": ">7.0.4",
+        "php": ">=7.1.3",
         "ext-mbstring": "*",
         "ext-iconv": "*",
         "checkdomain/holiday": "^3.0.0",
@@ -36,21 +36,21 @@
         "simplepie/simplepie": "^1.5.1",
         "studio-42/elfinder": "> 2.1.42",
         "swiftmailer/swiftmailer": "^6.2",
-        "symfony/config": "~2.5 | ~3.4 | ^4.0",
+        "symfony/config": "~3.4 | ^4.0",
         "symfony/console" : ">=2.6.0",
-        "symfony/css-selector": "~2.6 | ~3.4 | ^4.0",
+        "symfony/css-selector": "~3.4 | ^4.0",
         "symfony/debug": "~3.4 | ^4.0",
-        "symfony/dom-crawler": "~2.6 | ~3.4 | ^4.0",
+        "symfony/dom-crawler": "~3.4 | ^4.0",
         "symfony/event-dispatcher": "~3.4 | ^4.0",
-        "symfony/finder": "~2.8 | ~3.4 | ^4.0",
+        "symfony/finder": "~3.4 | ^4.0",
         "symfony/form": "~3.4 | ^4.0",
-        "symfony/http-foundation": "~2.8.29 | ~3.4 | ^4.0",
+        "symfony/http-foundation": "~3.4 | ^4.0",
         "symfony/intl": "~3.4 | <4.3",
         "symfony/options-resolver": "~3.4 | ^4.0",
-        "symfony/routing": "~3.4 | <4.3",
-        "symfony/security-csrf": "~2.5 | ~3.4 | ^4.0",
-        "symfony/translation": "~2.3 | ~3.4 | ^4.0",
-        "symfony/validator": "~2.8.9 | ~3.4 | ^4.0",
+        "symfony/routing": "~3.4 | ^4.0",
+        "symfony/security-csrf": "~3.4 | ^4.0",
+        "symfony/translation": "~3.4 | ^4.0",
+        "symfony/validator": "~3.4 | ^4.0",
         "symfony/var-dumper": "~3.4 | ^4.0",
         "symfony/yaml": "~3.4 | ^4.0",
         "symfony/http-kernel": "~3.4 | ^4.0",
@@ -93,6 +93,6 @@
         "classmap": ["test"]
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.5 | ^7.5"
+        "phpunit/phpunit": "^7.5"
     }
 }