fix(deps): Upgrade MQTT.js to v4.2.6 to fix reconnect bug

package.json

@@ -32,7 +32,7 @@
     "lowdb": "^1.0.0",
     "moment": "^2.24.0",
     "monaco-editor": "^0.20.0",
-    "mqtt": "4.2.1",
+    "mqtt": "4.2.6",
     "vm2": "latest",
     "vue": "^2.6.12",
     "vue-class-component": "^7.0.2",

yarn.lock

@@ -7540,36 +7540,33 @@ move-concurrently@^1.0.1:
     rimraf "^2.5.4"
     run-queue "^1.0.3"
 
-mqtt-packet@^6.3.2:
-  version "6.6.0"
-  resolved "https://registry.npm.taobao.org/mqtt-packet/download/mqtt-packet-6.6.0.tgz#30126b6865992caaf223baae23c89e4061ad2e45"
-  integrity sha1-MBJraGWZLKryI7quI8ieQGGtLkU=
+mqtt-packet@^6.6.0:
+  version "6.10.0"
+  resolved "https://registry.yarnpkg.com/mqtt-packet/-/mqtt-packet-6.10.0.tgz#c8b507832c4152e3e511c0efa104ae4a64cd418f"
+  integrity sha512-ja8+mFKIHdB1Tpl6vac+sktqy3gA8t9Mduom1BA75cI+R9AHnZOiaBQwpGiWnaVJLDGRdNhQmFaAqd7tkKSMGA==
   dependencies:
     bl "^4.0.2"
     debug "^4.1.1"
     process-nextick-args "^2.0.1"
 
-[email protected].1:
-  version "4.2.1"
-  resolved "https://registry.npm.taobao.org/mqtt/download/mqtt-4.2.1.tgz#7dbc4a01b5188186db90919c6fce318692c77004"
-  integrity sha1-fbxKAbUYgYbbkJGcb84xhpLHcAQ=
+[email protected].6:
+  version "4.2.6"
+  resolved "https://registry.yarnpkg.com/mqtt/-/mqtt-4.2.6.tgz#b655547a9cfb3d86bfb398948b8dbb37e2e3bfd0"
+  integrity sha512-GpxVObyOzL0CGPBqo6B04GinN8JLk12NRYAIkYvARd9ZCoJKevvOyCaWK6bdK/kFSDj3LPDnCsJbezzNlsi87Q==
   dependencies:
-    base64-js "^1.3.0"
     commist "^1.0.0"
-    concat-stream "^1.6.2"
+    concat-stream "^2.0.0"
     debug "^4.1.1"
-    end-of-stream "^1.4.1"
-    es6-map "^0.1.5"
     help-me "^1.0.1"
     inherits "^2.0.3"
     minimist "^1.2.5"
-    mqtt-packet "^6.3.2"
+    mqtt-packet "^6.6.0"
     pump "^3.0.0"
-    readable-stream "^2.3.6"
+    readable-stream "^3.6.0"
     reinterval "^1.1.0"
     split2 "^3.1.0"
     ws "^7.3.1"
-    xtend "^4.0.1"
+    xtend "^4.0.2"
 
 [email protected]:
   version "2.0.0"