Switch to upstream uniffi-bindgen-react-native

The upstream repo (jhugman/uniffi-bindgen-react-native) merged
uniffi 0.30 support in PR payjoin#343, so we no longer need the fork.

- Point dependency at upstream main (pinned to 93bed37)
- Add uniffi_core 0.30 with wasm-unstable-single-threaded feature
  to wasm-manifest-patch.toml, since upstream's runtime crate
  hasn't enabled it yet and uniffi_core 0.30 requires it for
  wasm32 builds

Author: spacebear21

payjoin-ffi/javascript/package-lock.json

@@ -29,7 +29,7 @@
         "prettier": "^3.6.2",
         "tsx": "^4.20.6",
         "typescript": "^5.9.3",
-        "uniffi-bindgen-react-native": "github:spacebear21/uniffi-bindgen-react-native#update-uniffi-0.30-wasm"
+        "uniffi-bindgen-react-native": "github:jhugman/uniffi-bindgen-react-native#93bed377c6e0b5cd7afd3fb7ee0d7211d5f294c5"
     },
     "repository": {
         "type": "git",

payjoin-ffi/javascript/package.json

@@ -9,9 +9,17 @@
 # the library and CLI versions causes "unreachable" panics at runtime.
 wasm-bindgen = "=0.2.108"
 
+# uniffi_core 0.30 requires this feature for wasm32 builds to remove the
+# Send bound on futures, which is not applicable in single-threaded WASM.
+[dependencies.uniffi_core]
+version = "0.30"
+default-features = false
+features = ["wasm-unstable-single-threaded"]
+
 [patch.crates-io]
 payjoin = { path = "../../../../payjoin" }
 payjoin-directory = { path = "../../../../payjoin-directory" }
 payjoin-test-utils = { path = "../../../../payjoin-test-utils" }
-# This patch is required due to the hardcoded 0.29 dependency in uniffi-bindgen-react-native's Cargo.toml. Once they publish the 0.30 package we shouldn't need this anymore.
+# uniffi-runtime-javascript is not yet published with uniffi_core 0.30 support.
+# This path patch lets cargo resolve it from the installed npm package.
 uniffi-runtime-javascript = { path = "../../node_modules/uniffi-bindgen-react-native/crates/uniffi-runtime-javascript" }