replaced 8-line IE11-era object with MUI v7 query string

Signed-off-by: YASHMAHAKAL <yvsst01@gmail.com>

Author: YASHMAHAKAL

.swcrc

@@ -16,15 +16,7 @@
         "externalHelpers": false
     },
     "env": {
-        "targets": {
-            "ie": "11",
-            "chrome": "58",
-            "firefox": "54",
-            "safari": "10",
-            "edge": "15",
-            "ios": "8",
-            "android": "4"
-        },
+        "targets": "> 0.5%, last 2 versions, Firefox ESR, not dead, safari >= 15.4, iOS >= 15.4",
         "mode": "usage",
         "coreJs": "3"
     },

rollup.config.js

@@ -30,13 +30,9 @@ export default {
         externalHelpers: false,
       },
       env: {
-        targets: {
-          ie: '11',
-          chrome: '58',
-          firefox: '54',
-          safari: '10',
-          edge: '15',
-        },
+        // Aligned with MUI v7's official browser support policy:
+        // https://mui.com/material-ui/getting-started/supported-platforms/
+        targets: '> 0.5%, last 2 versions, Firefox ESR, not dead, safari >= 15.4, iOS >= 15.4',
         mode: 'usage',
         coreJs: '3',
       },