Docs: Fix libhalo npm package references (#220)

docs/desktop-gateway.md

@@ -4,7 +4,7 @@
 ```bash
 npm i --save qrcode
 npm i --save websocket
-npm i --save libhalo
+npm i --save @arx-research/libhalo
 ```
 
 ## Basic usage

docs/desktop-pcsc.md

@@ -3,7 +3,7 @@
 ## Install dependencies
 ```bash
 npm i --save nfc-pcsc
-npm i --save libhalo
+npm i --save @arx-research/libhalo
 ```
 
 ## Basic usage

docs/mobile-react-native.md

@@ -9,7 +9,7 @@ These steps are common for both Android and iOS applications:
 **Using NPM:**
 ```
 npm install --save react-native-nfc-manager
-npm install --save libhalo
+npm install --save @arx-research/libhalo
 ```
 **Using Yarn:**
 ```bash