0.1.0, new URL encoding

0.1.0 is a breaking change.
The URL encoding and decoding is simplified.
Before 0.1.0, zustand-querystring used a proprietary format to encode the state in the URL.
While this made the URL more readable and short, it could cause unexpected issues when other tools/libraries tried to parse it.
In this new version, encoding and decoding is handled by encodeURIComponent and decodeURIComponent. This makes the state in the URL unreadable, but should be more compatible with third-party tools.