添加配置，修复错误

Author: CppCXY

script/config/config.lua

@@ -212,6 +212,7 @@ local Template = {
     ['Lua.format.enable']                   = Type.Boolean >> true,
     ['Lua.format.defaultConfig']            = Type.Hash(Type.String, Type.String)
                                             >> {},
+    ['Lua.spell.dict']                      = Type.Array(Type.String),
     ['Lua.telemetry.enable']                = Type.Or(Type.Boolean >> false, Type.Nil) >> nil,
     ['files.associations']                  = Type.Hash(Type.String, Type.String),
     ['files.exclude']                       = Type.Hash(Type.String, Type.Boolean),

script/provider/spell.lua

@@ -48,7 +48,7 @@ function m.initDictionary()
 end
 
 config.watch(function (uri, key, value, oldValue)
-    if key == 'Lua.spell.dict' then
+    if key == 'Lua.spell.dict' and uri ~= nil then
         diagnostics.refresh(uri)
     end
 end)