Update changelog and readme [release]

.github/changelog.md

@@ -1,13 +1,19 @@
 ### 0.3.0
 
+**September 21st, 2018**
+
 The [sel-hncom](https://github.com/sel-project/sel-hncom) library has been merged
-with Selery and now uses the [packet-maker](https://github.com/Kripth/packet-maker)
-library.
+with Selery and now uses the [xpacket](https://github.com/Kripth/xpacket) library.
+
+New library ([sel-data](https://github.com/sel-project/sel-data)) used to provide IDs;
+it will replace sel-utils in the future.
 
 New library for reading roman numbers.
 
 ### 0.2.0
 
+**June 4th, 2018**
+
 The parent/children model for worlds has been replaced by the group system.
 Players cannot be transferred between worlds yet.
 
@@ -37,8 +43,12 @@ of Selery on Windows x86.
 
 ### 0.1.1
 
+**February 9th, 2018**
+
 Added more command-line options and improved the project's README file.
 
 ### 0.1.0
 
+**February 8th, 2018**
+
 Initial release.

README.md

@@ -1,7 +1,7 @@
 Selery
 ======
 
-Selery is a server for Minecraft (Bedrock Engine) and Minecraft: Java Edition written in [D](https://dlang.org).
+Selery is a server for Minecraft (Bedrock Engine) 1.2 and Minecraft: Java Edition 1.10-1.12 written in [D](https://dlang.org).
 
 [![Chat](https://img.shields.io/badge/chat-on%20discord-7289da.svg)](https://discord.gg/c9uwNMW)