Uncaught RangeError: Invalid string length

[wang-yikai]

The following line causes the string to become very large if there are a lot of tokens: https://github.com/ant-design/cssinjs/blob/92dce00796e2644dad391b49ec1def849329234a/src/util.ts#L47

If the string becomes too long, it would exceed the capacity of the runtime system and raise an Uncaught RangeError: Invalid string length error.