fix(tab): Explicitly set margin to 0 on tabs for Safari (#4654)

Author: williamernest

packages/mdc-tab/mdc-tab.scss

@@ -41,6 +41,8 @@
   justify-content: center;
   box-sizing: border-box;
   height: $mdc-tab-height;
+  // Explicitly setting margin to 0 is to override safari default margin for button elements.
+  margin: 0;
   padding: 0 24px;
   border: none;
   outline: none;