wasm-bindgen-cli-support: update base64 0.9 to 0.21 (#3777)

Author: serprex

crates/cli-support/Cargo.toml

@@ -14,7 +14,7 @@ rust-version = "1.57"
 
 [dependencies]
 anyhow = "1.0"
-base64 = "0.9"
+base64 = "0.21"
 log = "0.4"
 rustc-demangle = "0.1.13"
 serde_json = "1.0"

crates/cli-support/src/wasm2es6js.rs

@@ -1,4 +1,5 @@
 use anyhow::{bail, Error};
+use base64::{prelude::BASE64_STANDARD, Engine as _};
 use std::collections::HashSet;
 use std::fmt::Write;
 use walrus::Module;
@@ -241,7 +242,7 @@ impl Output {
                         bytes = Buffer.from(base64, 'base64');
                     }}
                     ",
-                    base64 = base64::encode(&wasm)
+                    base64 = BASE64_STANDARD.encode(&wasm)
                 ),
                 inst,
             )