Ignore the check for table.unpack

Table unpack is not available in either Lua 5.1 nor LuaJIT, yet it's used as a fallback for unpack. This is not an error on itself, but is listed as an error by Luacheck. An alternative solution would be to remove this line entirely

src/project.lua

@@ -148,7 +148,7 @@ function Project:excludeFiles()
     dir = "^"..dir
   end
 
-  local unpack = unpack or table.unpack
+  local unpack = unpack or table.unpack -- luacheck: ignore
   for i=#self._fileList,1,-1 do
     if isExcluded(self._fileList[i], dir, unpack(self.excludeFileList)) then
       table.remove(self._fileList, i)