fix(searchbar): update signature mismatch in template & class (#11599)

fixes #11598

Author: kulshekhar

src/components/searchbar/searchbar.ts

@@ -34,7 +34,7 @@ import { Platform } from '../../platform/platform';
         '<ion-icon name="md-arrow-back"></ion-icon>' +
       '</button>' +
       '<div #searchbarIcon class="searchbar-search-icon"></div>' +
-      '<input #searchbarInput class="searchbar-input" (input)="inputChanged($event)" (blur)="inputBlurred($event)" (focus)="inputFocused($event)" ' +
+      '<input #searchbarInput class="searchbar-input" (input)="inputChanged($event)" (blur)="inputBlurred()" (focus)="inputFocused()" ' +
         '[attr.placeholder]="placeholder" ' +
         '[attr.type]="type" ' +
         '[attr.autocomplete]="_autocomplete" ' +