Add typography mixin

Author: jwshinjwshin

src/lib/core/typography/_all-typography.scss

@@ -22,6 +22,7 @@
 @import '../../sidenav/sidenav-theme';
 @import '../../slide-toggle/slide-toggle-theme';
 @import '../../slider/slider-theme';
+@import '../../stepper/stepper-theme';
 @import '../../tabs/tabs-theme';
 @import '../../toolbar/toolbar-theme';
 @import '../../tooltip/tooltip-theme';
@@ -61,6 +62,7 @@
   @include mat-sidenav-typography($config);
   @include mat-slide-toggle-typography($config);
   @include mat-slider-typography($config);
+  @include mat-stepper-typography($config);
   @include mat-tabs-typography($config);
   @include mat-toolbar-typography($config);
   @include mat-tooltip-typography($config);

src/lib/stepper/_stepper-theme.scss

@@ -1,6 +1,6 @@
 @import '../core/theming/palette';
 @import '../core/theming/theming';
-@import '../core/typography/_typography-utils.scss';
+@import '../core/typography/typography-utils';
 
 @mixin mat-stepper-theme($theme) {
   $foreground: map-get($theme, foreground);
@@ -45,3 +45,9 @@
     border-top-color: mat-color($foreground, divider);
   }
 }
+
+@mixin mat-stepper-typography($config) {
+  .mat-stepper-vertical, .mat-stepper-horizontal {
+    font-family: mat-font-family($config);
+  }
+}