Sub-Store 2.0 major release

- Used Peggy.js to replace the original parsers for Loon, QX and Surge.
- Added support for vmess + ws, vmess + http, snell, socks 5 parsing.
- Added various test cases for parsing.

backend/.babelrc

@@ -3,5 +3,12 @@
         [
             "@babel/preset-env"
         ]
-    ]
+    ],
+    "env": {
+        "test": {
+            "presets": [
+                "@babel/preset-env"
+            ]
+        }
+    }
 }