Merge pull request #190 from sprioleau/sprioleau/deprecated-division

Fixes Sass division deprecation warning
Resolves #188

stylesheets/breakpoint/_helpers.scss

@@ -1,6 +1,9 @@
 //////////////////////////////
 // Converts the input value to Base EMs
 //////////////////////////////
+
+@use "sass:math";
+
 @function breakpoint-to-base-em($value) {
  $value-unit: unit($value);
 
@@ -25,16 +28,16 @@
  $unit: unit($value);
 
  @if $unit == 'px' {
- @return $value / 16px * 1em;
+ @return math.div($value / 16px) * 1em;
  }
  @else if $unit == '%' {
- @return $value / 100% * 1em;
+ @return math.div($value / 100%) * 1em;
  }
  @else if $unit == 'em' {
  @return $value;
  }
  @else if $unit == 'pt' {
- @return $value / 12pt * 1em;
+ @return math.div($value / 12pt) * 1em;
  }
  @else {
  @return $value;