Update metadata and releases for AutoPEP8 package (#6869)

New releases aren't supported for ST2 anymore,
however old versions are still available under "st2-" prefix.

repository/a.json

@@ -2168,10 +2168,17 @@
 		{
 			"name": "AutoPEP8",
 			"details": "https://github.com/wistful/SublimeAutoPEP8",
+			"labels": ["linting", "formatting"],
+			"readme": "https://raw.githubusercontent.com/wistful/SublimeAutoPEP8/master/Readme.md",
+			"issues": "https://github.com/wistful/SublimeAutoPEP8/issues",
 			"releases": [
 				{
-					"sublime_text": "*",
+					"sublime_text": ">=3000",
 					"tags": true
+				},
+				{
+					"sublime_text": "<3000",
+					"tags": "st2-"
 				}
 			]
 		},