Update README

Add a blob for the new payjoin-test-utils crate. Remove obsolete wallet
examples.

Author: spacebear21

README.md

@@ -6,9 +6,7 @@ Supercharged payment batching to save you fees and preserve your privacy.
 
 ### `payjoin`
 
-The Payjoin Dev Kit `payjoin` library implements both [BIP 78 Payjoin V1](https://github.com/shesek/bips/blob/master/bip-0078.mediawiki) and [BIP 77 Payjoin V2](https://github.com/bitcoin/bips/pull/1483).
-
-The `payjoin` crate is compatible with many wallets like LND in [nolooking](https://github.com/chaincase-app/nolooking) and Bitcoin Dev Kit in [Mutiny Wallet](https://github.com/MutinyWallet/mutiny-node) and in [BitMask](https://github.com/diba-io/bitmask-core)
+The Payjoin Dev Kit `payjoin` library implements both [BIP 78 Payjoin V1](https://github.com/bitcoin/bips/blob/master/bip-0078.mediawiki) and [BIP 77 Payjoin V2](https://github.com/bitcoin/bips/pull/1483).
 
 ### `payjoin-cli`
 
@@ -18,6 +16,10 @@ The [`payjoin-cli`](https://github.com/payjoin/rust-payjoin/tree/master/payjoin-
 
 The [`payjoin-directory`](https://github.com/payjoin/rust-payjoin/tree/master/payjoin-directory) crate implements the Payjoin Directory store-and-forward server required for Payjoin V2's asynchronous operation.
 
+### `payjoin-test-utils`
+
+The [`payjoin-test-utils`](https://github.com/payjoin/rust-payjoin/tree/master/payjoin-test-utils) crate provides commonly used testing fixtures such as a local OHTTP relay and payjoin directory, bitcoind node and wallets, and official test vectors.
+
 ### Disclaimer ⚠️ WIP
 
 **Use at your own risk. This crate has not yet been reviewed by independent Rust and Bitcoin security professionals.**