chore(platform): modern browser targets + websocket upgrade

lib/client/index.js

@@ -1041,8 +1041,8 @@ client.load = function load (serverSettings, callback) {
   // Client-side code to connect to server and handle incoming data
   ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
   /* global io */
-  client.socket = socket = io.connect({ transports: ["polling"] });
-  client.alarmSocket = alarmSocket = io.connect("/alarm", { multiplex: true, transports: ["polling"] });
+  client.socket = socket = io.connect({ transports: ["polling", "websocket"] });
+  client.alarmSocket = alarmSocket = io.connect("/alarm", { multiplex: true, transports: ["polling", "websocket"] });
 
   socket.on('dataUpdate', dataUpdate);
 

package.json

@@ -64,6 +64,13 @@
     "test:slow": "SLOW_TEST_THRESHOLD=1000 env-cmd -f ./my.test.env mocha --timeout 10000 --require ./tests/hooks.js --exit ./tests/*.test.js"
   },
   "main": "lib/server/server.js",
+  "browserslist": [
+    "Chrome >= 80",
+    "Firefox >= 78",
+    "Safari >= 13.1",
+    "iOS >= 13.4",
+    "Edge >= 80"
+  ],
   "nodemonConfig": {
     "ignore": [
       "tests/*",