gnu: Add rust-capnpc-0.19.

* gnu/packages/crates-io.scm (rust-capnpc-0.19): New variable.
(rust-capnpc-0.13): Inherit from rust-capnpc-0.19.

Change-Id: I7d866d19f0b18a1db4ff5619d3879caf54fb4cd2

gnu/packages/crates-io.scm

@@ -10903,8 +10903,30 @@ remote procedure call protocol")
        #:cargo-development-inputs
        (("rust-capnpc" ,rust-capnpc-0.13))))))
 
+(define-public rust-capnpc-0.19
+  (package
+    (name "rust-capnpc")
+    (version "0.19.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "capnpc" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1v49w7zsv4bkdn88dfmi2hk5dzv5pgs0qwgkq99jsn081w7a6ny7"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-test-flags '("--release" "--"
+                            "--skip=compiler_command_new_no_out_dir")
+       #:cargo-inputs (("rust-capnp" ,rust-capnp-0.19))))
+    (home-page "https://github.com/capnproto/capnproto-rust")
+    (synopsis "Cap'n Proto code generation")
+    (description "Cap'n Proto code generation.")
+    (license license:expat)))
+
 (define-public rust-capnpc-0.13
   (package
+    (inherit rust-capnpc-0.19)
     (name "rust-capnpc")
     (version "0.13.1")
     (source
@@ -10914,14 +10936,9 @@ remote procedure call protocol")
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "1hbm5xqpam3f0ha5ds39wjmpqpzdalpbrls9wlp7m3slh3p5r1c1"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:skip-build? #t
-       #:cargo-inputs (("rust-capnp" ,rust-capnp-0.13))))
-    (home-page "https://github.com/capnproto/capnproto-rust")
-    (synopsis "Cap'n Proto code generation")
-    (description "Cap'n Proto code generation")
-    (license license:expat)))
+       #:cargo-inputs (("rust-capnp" ,rust-capnp-0.13))))))
 
 (define-public rust-caps-0.5
   (package