require ^7.0 (#35)

I assume it was perhaps a mistake, as it locks to 7.0.0 with no upgrade possible

composer.json

@@ -5,21 +5,21 @@
     "keywords": ["symfony","select2"],
     "license": "MIT",
     "require": {
-        "symfony/framework-bundle": "^4.4|^5.0|^6.0|7.0",
-        "symfony/config": "^4.4|^5.0|^6.0|7.0",
-        "symfony/dependency-injection": "^4.4|^5.0|^6.0|7.0",
-        "symfony/form": "^4.4|^5.0|^6.0|7.0",
-        "symfony/http-kernel": "^4.4|^5.0|^6.0|7.0",
-        "symfony/options-resolver": "^4.4|^5.0|^6.0|7.0",
-        "symfony/routing": "^4.4|^5.0|^6.0|7.0"
+        "symfony/framework-bundle": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/config": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/dependency-injection": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/form": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/http-kernel": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/options-resolver": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/routing": "^4.4|^5.0|^6.0|^7.0"
     },
     "require-dev": {
         "ext-intl": "*",
-        "symfony/event-dispatcher": "^4.4|^5.0|^6.0|7.0",
-        "symfony/http-foundation": "^4.4|^5.0|^6.0|7.0",
-        "symfony/property-access": "^4.4|^5.0|^6.0|7.0",
-        "symfony/serializer": "^4.4|^5.0|^6.0|7.0",
-        "symfony/doctrine-bridge": "^4.4|^5.0|^6.0|7.0",
+        "symfony/event-dispatcher": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/http-foundation": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/property-access": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/serializer": "^4.4|^5.0|^6.0|^7.0",
+        "symfony/doctrine-bridge": "^4.4|^5.0|^6.0|^7.0",
         "doctrine/mongodb-odm-bundle": "^4.3"
     },
     "autoload": {