Relax version constraint for Neos 7

Author: mficzel

composer.json

@@ -4,13 +4,10 @@
     "name": "sitegeist/taxonomy",
     "license": "GPL-3.0+",
     "require": {
-        "neos/neos": "^4.3 || ^5.0 || dev-master",
-        "neos/neos-ui": "^4.0 || ^5.0 || dev-master",
+        "neos/neos": "^4.3 || ^5.0 || ^7.0 || dev-master",
+        "neos/neos-ui": "^4.0 || ^5.0 || ^7.0 ||  dev-master",
         "neos/content-repository": "*"
     },
-    "suggest": {
-        "sitegeist/silhouettes": "^1.0.0"
-    },
     "autoload": {
         "psr-4": {
             "Sitegeist\\Taxonomy\\": "Classes/"