Update base64 to latest version

As I said elsewhere: not a fan of the API changes. But here the code is
easy to adjust and it's good to stay with the latest version to avoid
dependencies trees having different versions of the same crates.

Cargo.toml

@@ -26,7 +26,7 @@ compress = ["flate2", "reinda-macros/compress"]
 
 [dependencies]
 ahash = "0.8.3"
-base64 = { version = "0.13", optional = true }
+base64 = { version = "0.21.0", optional = true }
 bytes = "1"
 flate2 = { version = "1", optional = true }
 reinda-core = { version = "=0.0.2", path = "core" }

src/hash.rs

@@ -1,5 +1,6 @@
 use bytes::Bytes;
 use reinda_core::AssetDef;
+use base64::Engine;
 
 
 #[cfg(not(feature = "hash"))]
@@ -36,9 +37,8 @@ pub(crate) fn hashed_path_of(def: &AssetDef, content: &Bytes) -> String {
 
     // Calc and then base64 encode the hash.
     let hash = Sha256::digest(&content);
-    base64::encode_config_buf(
+    base64::engine::general_purpose::URL_SAFE_NO_PAD.encode_string(
         &hash.as_slice()[..HASH_BYTES_IN_FILENAME],
-        base64::URL_SAFE_NO_PAD,
         &mut out,
     );