use spaces as tabs, make .h files be treated as c headers, not c++

lua/anth64/set.lua

@@ -7,7 +7,7 @@ vim.opt.relativenumber = true
 vim.opt.tabstop = 2
 vim.opt.softtabstop = 2
 vim.opt.shiftwidth = 2
-vim.opt.expandtab = false
+vim.opt.expandtab = true
 
 vim.opt.smartindent = true
 
@@ -30,4 +30,5 @@ vim.opt.updatetime = 50
 
 vim.opt.colorcolumn = "80"
 
+vim.g.c_syntax_for_h = 1
 vim.g.mapleader = " "