Feature/wasm client fix (nymtech#399)

* Disabling wasm optimization for the moment, it isn't working on my machine

* Updating the React example back to a working state, 0.8.1 npm package is published.

* Merging develop into bugfix

* Upgrading react-scripts to fix a major vulnerability

clients/webassembly/Cargo.toml

@@ -48,7 +48,6 @@ wee_alloc = { version = "0.4", optional = true }
 wasm-bindgen-test = "0.2"
 
 [package.metadata.wasm-pack.profile.release]
-# this needs to be disabled until https://github.com/rustwasm/wasm-pack/issues/886 is resolved
-wasm-opt = ["-Oz", "--enable-mutable-globals"]
+wasm-opt = false