Use xo 0.53.0 and fix errors

Signed-off-by: Christian König <ckoenig@posteo.de>

scripts/pi-hole/js/utils.js

@@ -77,7 +77,7 @@ function showAlert(type, icon, title, message) {
   var opts = {};
   title = "&nbsp;<strong>" + title + "</strong><br>";
   switch (type) {
-    case "info":
+    case "info": {
       opts = {
         type: "info",
         icon: "far fa-clock",
@@ -86,7 +86,9 @@ function showAlert(type, icon, title, message) {
       };
       info = $.notify(opts);
       break;
-    case "success":
+    }
+
+    case "success": {
       opts = {
         type: "success",
         icon: icon,
@@ -100,7 +102,9 @@ function showAlert(type, icon, title, message) {
       }
 
       break;
-    case "warning":
+    }
+
+    case "warning": {
       opts = {
         type: "warning",
         icon: "fas fa-exclamation-triangle",
@@ -114,7 +118,9 @@ function showAlert(type, icon, title, message) {
       }
 
       break;
-    case "error":
+    }
+
+    case "error": {
       opts = {
         type: "danger",
         icon: "fas fa-times",
@@ -128,6 +134,8 @@ function showAlert(type, icon, title, message) {
       }
 
       break;
+    }
+
     default:
   }
 }
@@ -200,12 +208,12 @@ function validateIPv6CIDR(ip) {
 }
 
 function validateMAC(mac) {
-  var macvalidator = new RegExp(/^([\da-fA-F]{2}:){5}([\da-fA-F]{2})$/);
+  var macvalidator = /^([\da-fA-F]{2}:){5}([\da-fA-F]{2})$/;
   return macvalidator.test(mac);
 }
 
 function validateHostname(name) {
-  var namevalidator = new RegExp(/[^<>;"]/);
+  var namevalidator = /[^<>;"]/;
   return namevalidator.test(name);
 }