fix: fontawesome 5 latest version

dev/templates/legacy.pug

@@ -38,7 +38,7 @@ html
       link(
         type='text/css'
         rel='stylesheet'
-        href='https://use.fontawesome.com/releases/v5.0.13/css/all.css'
+        href='https://use.fontawesome.com/releases/v5.9.0/css/all.css'
         )
     else if config.theming.iconset === 'fa4'
       link(

dev/templates/master.pug

@@ -42,7 +42,7 @@ html
       link(
         type='text/css'
         rel='stylesheet'
-        href='https://use.fontawesome.com/releases/v5.0.13/css/all.css'
+        href='https://use.fontawesome.com/releases/v5.9.0/css/all.css'
         )
     else if config.theming.iconset === 'fa4'
       link(