Polkavm heap (#2)

Use PolkaVM heap

crates/stdlib/Cargo.toml

@@ -6,4 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-inkwell = { workspace = true, no-default-features = true, features = ["target-riscv", "no-libffi-linking", "llvm16-0"] }
+inkwell = { workspace = true, features = ["target-riscv", "no-libffi-linking", "llvm16-0"] }