add missing font to dracula theme, fixes hakimel#3781

Author: hakimel

css/theme/source/dracula.scss

@@ -9,9 +9,10 @@
 @import "../template/settings";
 // ---------------------------------------------
 
-
-
 // Include theme-specific fonts
+@import url(./fonts/league-gothic/league-gothic.css);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
+
 $systemFontsSansSerif: -apple-system,
 					   BlinkMacSystemFont,
 					   avenir next,

dist/theme/dracula.css

@@ -2,6 +2,8 @@
  * Dracula Dark theme for reveal.js.
  * Based on https://draculatheme.com
  */
+@import url(./fonts/league-gothic/league-gothic.css);
+@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic);
 /**
  * Dracula colors by Zeno Rocha
  * https://draculatheme.com/contribute