Updated lowest version of dependencies

Author: norberttech

composer.json

@@ -16,9 +16,9 @@
     "require": {
         "php": ">=5.3.0",
         "ext-filter": "*",
-        "coduo/php-to-string": "^2.0",
-        "symfony/property-access": "^2|^3.0",
-        "symfony/expression-language": "^2|^3.0",
+        "coduo/php-to-string": "^2",
+        "symfony/property-access": "^2.3|^3.0",
+        "symfony/expression-language": "^2.3|^3.0",
         "doctrine/lexer": "1.0.*",
         "openlss/lib-array2xml": "0.0.10"
     },