nvim: stop reading config if nvim is too old

.config/nvim/init.lua

@@ -1,5 +1,10 @@
-if vim.fn.has('nvim-0.7.0') == 0 then
-    print("Old version detected. Some stuff will probably not work.")
+local version_required = 'nvim-0.7.0'
+-- 0.7.0 features we need:
+--   - autocommands in Lua
+--   - bind key mappings directly to Lua functions
+if vim.fn.has(version_required) == 0 then
+    print("💥 need " .. version_required .. ", config files will NOT be read!")
+    return nil
 end
 
 require('my/plugins')