fix: add RTL support

Author: mrholek

scss/mixins/_float.scss

@@ -1,11 +1,21 @@
 // stylelint-disable declaration-no-important
 
 @mixin float-left() {
-  float: left !important;
+  @include ltr {
+    float: left !important;
+  }
+  @include rtl {
+    float: right !important;
+  }
   @include deprecate("The `float-left` mixin", "v4.3.0", "v5");
 }
 @mixin float-right() {
-  float: right !important;
+  @include ltr {
+    float: right !important;
+  }
+  @include rtl {
+    float: left !important;
+  }
   @include deprecate("The `float-right` mixin", "v4.3.0", "v5");
 }
 @mixin float-none() {