Prepare release 2.0.0

Author: vkovalenko-oro

composer.json

@@ -16,11 +16,11 @@
     },
     "require": {
         "php": ">=5.6",
-        "oro/platform": "1.x-dev",
-        "oro/crm-task-bundle": "1.x-dev",
-        "oro/crm-call-bundle": "1.x-dev",
-        "oro/calendar-bundle": "1.x-dev",
-        "oro/marketing": "1.x-dev"
+        "oro/platform": "2.0.0",
+        "oro/crm-task-bundle": "2.0.0",
+        "oro/crm-call-bundle": "2.0.0",
+        "oro/calendar-bundle": "2.0.0",
+        "oro/marketing": "2.0.0"
     },
     "extra": {
         "branch-alias": {