Allow Symfony versions up to 3.0.0 (and fix psr/log constraint to only 1.0.*)

composer.json

@@ -51,13 +51,13 @@
   "require": {
     "dompdf/dompdf" : "0.8.*",
     "electrolinux/phpquery": "^0.9.6",
-    "symfony/config": "~2.5.0",
-    "symfony/dependency-injection": "~2.5.0",
-    "symfony/event-dispatcher": "~2.5.0",
-    "symfony/filesystem": "~2.5.0",
-    "symfony/process": "~2.5.0",
-    "psr/log": "^1.0.0",
-    "symfony/finder": "~2.5.0",
+    "symfony/config": "^2.5.0",
+    "symfony/dependency-injection": "^2.5.0",
+    "symfony/event-dispatcher": "^2.5.0",
+    "symfony/filesystem": "^2.5.0",
+    "symfony/process": "^2.5.0",
+    "psr/log": "~1.0.0",
+    "symfony/finder": "^2.5.0",
     "tecnickcom/tcpdf" : "6.2.*",
     "totten/ca-config": "~17.05",
     "zetacomponents/base": "1.7.*",