Bump leptos to 0.8 (#895)

Author: bicarlsen

.changes/leptos-bump.md

@@ -0,0 +1,6 @@
+---
+"create-tauri-app": "patch"
+"create-tauri-app-js": "patch"
+---
+
+Bump `leptos` to `0.8`.

templates/template-leptos/Cargo.toml.lte

@@ -5,7 +5,7 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [dependencies]
-leptos = { version = "0.7", features = ["csr"] }
+leptos = { version = "0.8", features = ["csr"] }
 wasm-bindgen = "0.2"
 wasm-bindgen-futures = "0.4"
 js-sys = "0.3"