Add tool 'text-size-adjust'

Signed-off-by: Valentin Popov <info@valentineus.link>

_scss/utilities/_textsizeadjust.scss

@@ -0,0 +1,13 @@
+// Text Size Adjust
+//
+// The text-size-adjust CSS property controls the text inflation algorithm used on some smartphones and tablets. Other browsers will ignore this property.
+//
+// Values: none | auto | <percentage>
+// Default: none
+//
+// https://drafts.csswg.org/css-size-adjust/#adjustment-control
+@mixin text-size-adjust($value: none) {
+  -webkit-text-size-adjust: $value;
+     -moz-text-size-adjust: $value;
+      -ms-text-size-adjust: $value;
+}