Added UPower to README

README.md

@@ -11,6 +11,7 @@
 - Tray [#21](https://github.com/Alexays/Waybar/issues/21)
 - Local time
 - Battery
+- UPower
 - Network
 - Bluetooth
 - Pulseaudio
@@ -71,6 +72,7 @@ libmpdclient [MPD module]
 libsndio [sndio module]
 libevdev [KeyboardState module]
 xkbregistry
+upower [UPower battery module]
 ```
 
 **Build dependencies**
@@ -104,6 +106,7 @@ sudo apt install \
   libspdlog-dev \
   libwayland-dev \
   scdoc \
+  upower \
   libxkbregistry-dev
 ```