Update rules_rust to latest. (#46)

Signed-off-by: Piotr Sikora <piotrsikora@google.com>

Author: PiotrSikora

WORKSPACE

@@ -2,35 +2,20 @@ workspace(name = "proxy_wasm_rust_sdk")
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-http_archive(
-    name = "bazel_skylib",
-    sha256 = "97e70364e9249702246c0e9444bccdc4b847bed1eb03c5a3ece4f83dfe6abc44",
-    urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.0.2/bazel-skylib-1.0.2.tar.gz",
-        "https://github.com/bazelbuild/bazel-skylib/releases/download/1.0.2/bazel-skylib-1.0.2.tar.gz",
-    ],
-)
-
-load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")
-
-bazel_skylib_workspace()
-
 http_archive(
     name = "io_bazel_rules_rust",
-    sha256 = "484a2b2b67cd2d1fa1054876de7f8d291c4b203fd256bc8cbea14d749bb864ce",
-    # Last commit where "out_binary = True" works.
-    # See: https://github.com/bazelbuild/rules_rust/issues/386
-    strip_prefix = "rules_rust-fda9a1ce6482973adfda022cadbfa6b300e269c3",
-    url = "https://github.com/bazelbuild/rules_rust/archive/fda9a1ce6482973adfda022cadbfa6b300e269c3.tar.gz",
+    sha256 = "17dbf791f4dab0fd4496ce5345af35e9ce2f6d011c1c8423436da517d019a3ea",
+    strip_prefix = "rules_rust-2f97db595b05b1ee8cc44bde5bdf03c00bd169fb",
+    url = "https://github.com/bazelbuild/rules_rust/archive/2f97db595b05b1ee8cc44bde5bdf03c00bd169fb.tar.gz",
 )
 
 load("@io_bazel_rules_rust//rust:repositories.bzl", "rust_repositories")
 
 rust_repositories()
 
-load("@io_bazel_rules_rust//:workspace.bzl", "bazel_version")
+load("@io_bazel_rules_rust//:workspace.bzl", "rust_workspace")
 
-bazel_version(name = "bazel_version")
+rust_workspace()
 
 load("//bazel/cargo:crates.bzl", "raze_fetch_remote_crates")