wip: fill out the snippets

packages/core-macro/Cargo.toml

@@ -12,7 +12,7 @@ description = "Core macro for Dioxus Virtual DOM"
 proc-macro = true
 
 [dependencies]
-once_cell = "1.7.2"
+once_cell = "1.8"
 proc-macro2 = { version = "1.0.6" }
 quote = "1.0"
 syn = { version = "1.0.11", features = ["full", "extra-traits"] }