fix(hl): follow linked highlight groups to get correct color (#103)

lua/feline/generator.lua

@@ -25,7 +25,7 @@ end
 -- If highlight is a string, use it as highlight name and
 -- extract the properties from the highlight
 local function get_hl_properties(hlname)
-    local opts = { name = hlname }
+    local opts = { name = hlname, link = false }
     local hl = api.nvim_get_hl(0, opts)
     local styles = {}