fix: fix vite build for CommonJS users

Related: socketio/socket.io-client#1504

Author: darrachequesne

package.json

@@ -51,7 +51,9 @@
   "browser": {
     "./test/node": "./test/browser",
     "./build/esm/encodePacket.js": "./build/esm/encodePacket.browser.js",
-    "./build/esm/decodePacket.js": "./build/esm/decodePacket.browser.js"
+    "./build/esm/decodePacket.js": "./build/esm/decodePacket.browser.js",
+    "./build/cjs/encodePacket.js": "./build/cjs/encodePacket.browser.js",
+    "./build/cjs/decodePacket.js": "./build/cjs/decodePacket.browser.js"
   },
   "engines": {
     "node": ">=10.0.0"