Add emerge support.

Author: manateelazycat

dependencies.json

@@ -1,20 +1,23 @@
 {
-    "pacman": [
-        "python-qrcode",
-        "filebrowser-bin"
-    ],
-    "apt": [
-        "python3-qrcode"
-    ],
-    "dnf": [
-        "python3-qrcode"
-    ],
-    "pkg": [
-        "py38-qrcode"
-    ],
-    "pip": {
-        "win32": [
-            "qrcode"
-        ]
-    }
+  "pacman": [
+    "python-qrcode",
+    "filebrowser-bin"
+  ],
+  "emerge": [
+    "dev-python/qrcode"
+  ],
+  "apt": [
+    "python3-qrcode"
+  ],
+  "dnf": [
+    "python3-qrcode"
+  ],
+  "pkg": [
+    "py38-qrcode"
+  ],
+  "pip": {
+    "win32": [
+      "qrcode"
+    ]
+  }
 }