gnu: Add rust-pulldown-cmark-0.4.

* gnu/packages/crates-io.scm (rust-pulldown-cmark-0.4): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/crates-io.scm

@@ -6945,6 +6945,39 @@ in terms of the upstream unstable API.")
      "Hypothesis-like property-based testing and shrinking.")
     (license (list license:asl2.0 license:expat))))
 
+(define-public rust-pulldown-cmark-0.4
+  (package
+    (name "rust-pulldown-cmark")
+    (version "0.4.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "pulldown-cmark" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1db8vlhm3n72051bkq4am80q28rfrh88796i3y9ajf5hhk3lrdyi"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-bitflags" ,rust-bitflags-1)
+        ("rust-getopts" ,rust-getopts-0.2)
+        ("rust-memchr" ,rust-memchr-2.2)
+        ("rust-unicase" ,rust-unicase-2.4))
+       #:cargo-development-inputs
+       (("rust-criterion" ,rust-criterion-0.2)
+        ("rust-html5ever" ,rust-html5ever-0.23)
+        ("rust-lazy-static" ,rust-lazy-static-1.3)
+        ("rust-regex" ,rust-regex-1.1)
+        ("rust-tendril" ,rust-tendril-0.4))))
+    (home-page "https://github.com/raphlinus/pulldown-cmark")
+    (synopsis "Pull parser for CommonMark")
+    (description
+     "This package provides a pull parser for CommonMark.")
+    (license license:expat)))
+
 (define-public rust-quick-error-1.2
   (package
     (name "rust-quick-error")