Increment minor version to v0.6.0

Short name and Baseline high date have been added to the schema:
#545
#593

Many features have also been added.

Author: foolip

packages/web-features/package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "web-features",
   "description": "Curated list of Web platform features",
-  "version": "0.5.1",
+  "version": "0.6.0",
   "license": "Apache-2.0",
   "repository": {
     "type": "git",