Change the default packetver to 20180620 (#3557)

We support all required features or have them ready in some pull requests.
The packet version after this will require a huge overhaul since item id sizes have been changed in all packets.

conf/battle/feature.conf

@@ -69,12 +69,12 @@ feature.achievement: on
 
 // Homunculues Autofeeding (Note 1)
 // Requires: 2017-09-20bRagexeRE or later
-feature.homunculus_autofeed: off
+feature.homunculus_autofeed: on
 
 // Attendance System (Note 1)
 // Requires: 2018-03-07bRagexeRE or later
-feature.attendance: off
+feature.attendance: on
 
 // Private Airship System (Note 1)
 // Requires: 2018-03-21aRagexeRE or later
-feature.privateairship: off
+feature.privateairship: on

src/config/packets.hpp

@@ -13,7 +13,7 @@
 	/// Do NOT edit this line! To set your client version, please do this instead:
 	/// In Windows: Add this line in your src\custom\defines_pre.hpp file: #define PACKETVER YYYYMMDD
 	/// In Linux: The same as above or run the following command: ./configure --enable-packetver=YYYYMMDD
-	#define PACKETVER 20151104
+	#define PACKETVER 20180620
 #endif
 
 #ifndef PACKETVER_RE