Fix - dev-to icon missing from scss

scss/_icons.scss

@@ -830,3 +830,4 @@
 .#{$fa-css-prefix}-hackaday:before { content: fa-content($fa-var-hackaday); }
 .#{$fa-css-prefix}-laravel:before { content: fa-content($fa-var-laravel); }
 .#{$fa-css-prefix}-signalapp:before { content: fa-content($fa-var-signalapp); }
+.#{$fa-css-prefix}-dev-to:before { content: fa-content($fa-var-dev-to); }

scss/_variables.scss

@@ -221,6 +221,7 @@ $fa-var-debian: \f2ff;
 $fa-var-dedent: \f03b;
 $fa-var-delicious: \f1a5;
 $fa-var-desktop: \f108;
+$fa-var-dev-to: \f316;
 $fa-var-deviantart: \f1bd;
 $fa-var-diamond: \f219;
 $fa-var-diaspora: \f2e5;