config: added skip_plugins_version

This new config flag ignores the plugins version check at startup
which helps a lot when working on new or old plugins that doesn't match
the mod or lite-xl version and you still desire to load them to fix them
by checking with lite-xl it self which errors need to be corrected.

data/core/config.lua

@@ -29,6 +29,9 @@ config.borderless = false
 config.tab_close_button = true
 config.max_clicks = 3
 
+-- set as true to be able to test non supported plugins
+config.skip_plugins_version = false
+
 config.plugins = {}
 -- Allow you to set plugin configs even if we haven't seen the plugin before.
 setmetatable(config.plugins, {