gnu: Add rust-webpki-0.19.

* gnu/packages/crates-io.scm (rust-webpki-0.19): New variable.

gnu/packages/crates-io.scm

@@ -32609,6 +32609,28 @@ attribute that is not in the shared backend crate.")
 Verification.")
     (license license:isc)))
 
+(define-public rust-webpki-0.19
+  (package
+    (inherit rust-webpki-0.21)
+    (name "rust-webpki")
+    (version "0.19.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "webpki" version))
+        (file-name
+         (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "10nhyxlqsa4caxlxrijm5h79rdg6ld8hqy78ldjnnfhaj3biqzjg"))))
+    (arguments
+     `(#:tests? #f  ; tests fail to build "missing file tests/ed25519/ee.der"
+       #:cargo-inputs
+       (("rust-ring" ,rust-ring-0.14)
+        ("rust-untrusted" ,rust-untrusted-0.6))
+       #:cargo-development-inputs
+       (("rust-base64" ,rust-base64-0.9))))))
+
 (define-public rust-webpki-0.18
   (package/inherit rust-webpki-0.21
     (name "rust-webpki")