Update changelog for version 0.5.4

Author: ThePlasticPotato

changelog.md

@@ -1,4 +1,16 @@
-# Changelog
+## 0.5.4
+Balloons!
 
-v0.5.1
-- Insert Changelog Here:tm:
+#### Changes:
+- Propeller force rewrite
+- Balloons!
+- Goggle overlay rewrite
+- New lang stuff
+
+#### Bugfixes:
+- Wings can once more be placed vertically
+- Jury-rigged blade breaking functions again
+- Client-side duct syncing was fixed
+- Gas particles now work on forge
+- Copter bearing has a visual instance
+- Phys bearings follow angle