Nostrmo 2.9.0 release!

Updates:

- NIP-29 Group support.

- Web version build error fix.

- Add NIP-07 at web version.

- Optimize the performance of other signers.

- Content base64 image decode support.

- Bugs fix.

I am happly to receive feedback. If you find something wrong or something about nostr, please let me know.

#nostrmo

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