Update yew requirement from 0.20 to 0.21

Updates the requirements on [yew](https://github.com/yewstack/yew) to permit the latest version.
- [Release notes](https://github.com/yewstack/yew/releases)
- [Changelog](https://github.com/yewstack/yew/blob/master/CHANGELOG.md)
- [Commits](yewstack/yew@yew-v0.20.0...yew-v0.21.0)

---
updated-dependencies:
- dependency-name: yew
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -53,7 +53,7 @@ tokio = { version = "1", features = ["rt", "macros"] }
 # The following dependencies are required for examples
 wasm-bindgen = "0.2"
 wasm-bindgen-futures = "0.4"
-yew = "0.20"
+yew = "0.21"
 lazy_static = "1.4"
 web-sys = "0.3"
 console_error_panic_hook = "0.1"

examples/web_app/Cargo.toml

@@ -12,7 +12,7 @@ crate-type = ["cdylib", "rlib"]
 serde_json = "1.0"
 wasm-bindgen = "0.2"
 wasm-bindgen-futures = "0.4.18"
-yew = {version="0.20", features = ["csr"]}
+yew = {version="0.21", features = ["csr"]}
 meilisearch-sdk = {path="../.."}
 lazy_static = "1.4"
 serde = {version="1.0", features=["derive"]}