update valuable-drop-prices (#6924)

* Create valuable-drop-prices

Simple plugin that replaces the default "coins" value with HA and GE prices to the valuable drop notifications.

* Update valuable-drop-prices

Updated to be using the correct commit

* Update valuable-drop-prices

- Fixed misspelled link in plugin properties
- Fixed bug relating to https://github.com/Anderzenn/valuable-drop-prices/issues/1
- Removed unused code from config
- Updated readme & set gradle settings project name to plugins name.

plugins/valuable-drop-prices

@@ -1,2 +1,2 @@
 repository=https://github.com/Anderzenn/valuable-drop-prices.git
-commit=c3d55293cbad3e42f16e8b48bf2236ad13370283
+commit=aef0a09c203e0209fe4f64b06ffe6bf10e40db56