Update base64 dependency to 0.10

0.10 has zero unsafe

Cargo.toml

@@ -11,7 +11,7 @@ categories = ["network-programming", "cryptography"]
 
 [dependencies]
 untrusted = "0.6.2"
-base64 = "0.9"
+base64 = "0.10"
 log = { version = "0.4.0", optional = true }
 ring = { version = "0.13.2", features = ["rsa_signing"] }
 webpki = "0.18.1"

src/pemfile.rs

@@ -32,7 +32,7 @@ fn extract<A>(rd: &mut io::BufRead,
 
         if line.starts_with(end_mark) {
             take_base64 = false;
-            let der = base64::decode_config(&b64buf, base64::MIME)
+            let der = base64::decode(&b64buf)
                 .map_err(|_| ())?;
             ders.push(f(der));
             b64buf = String::new();