gnu: Add julia-contour.

* gnu/packages/julia-xyz.scm (julia-contour-0.5.1): New variable.

gnu/packages/julia-xyz.scm

@@ -1279,3 +1279,24 @@ color scales for graphics.")
     (description "@code{PlotUtils.jl} is a julia package that provides helper
 algorithms for building plotting components.")
     (license license:expat)))
+
+(define-public julia-contour
+  (package
+    (name "julia-contour")
+    (version "0.5.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/JuliaGeometry/Contour.jl")
+             (commit (string-append "v" version))))
+       (file-name "Contour")
+       (sha256
+        (base32 "0l7zi2xshyv81xlp1szm47f6200lnhfylfdrsk7g0xiajr81acpd"))))
+    (propagated-inputs `(("julia-staticarrays" ,julia-staticarrays)))
+    (build-system julia-build-system)
+    (home-page "https://juliageometry.github.io/Contour.jl/stable/")
+    (synopsis "Calculating contour curves for 2D scalar fields in Julia")
+    (description "Generic implementation of the marching squares algorithm for
+tracing contour curves on a scalar 2D field.")
+    (license license:expat)))