Replace wasi crate with wasip2 (#721)

The recent releases of `wasi` simply re-export contents of `wasip2`.

Author: newpavlov

Cargo.lock

@@ -62,9 +62,9 @@ libc = { version = "0.2.154", default-features = false }
 [target.'cfg(target_os = "vxworks")'.dependencies]
 libc = { version = "0.2.154", default-features = false }
 
-# wasi (0.2 only)
+# wasi_p2
 [target.'cfg(all(target_arch = "wasm32", target_os = "wasi", target_env = "p2"))'.dependencies]
-wasi = { version = "0.14", default-features = false }
+wasip2 = { version = "1", default-features = false }
 
 # wasm_js
 [target.'cfg(all(target_arch = "wasm32", any(target_os = "unknown", target_os = "none")))'.dependencies]

Cargo.toml

@@ -1,7 +1,7 @@
 //! Implementation for WASI Preview 2.
 use crate::Error;
-use core::mem::MaybeUninit;
-use wasi::random::random::get_random_u64;
+use core::{mem::MaybeUninit, ptr::copy_nonoverlapping};
+use wasip2::random::random::get_random_u64;
 
 #[inline]
 pub fn inner_u32() -> Result<u32, Error> {
@@ -16,9 +16,6 @@ pub fn inner_u64() -> Result<u64, Error> {
 
 #[inline]
 pub fn fill_inner(dest: &mut [MaybeUninit<u8>]) -> Result<(), Error> {
-    use core::ptr::copy_nonoverlapping;
-    use wasi::random::random::get_random_u64;
-
     let (prefix, chunks, suffix) = unsafe { dest.align_to_mut::<MaybeUninit<u64>>() };
 
     // We use `get_random_u64` instead of `get_random_bytes` because the latter creates