gnu: Add julia-orderedcollections.

* gnu/packages/julia-xyz.scm (julia-orderedcollections-1.1.0): New variable.

gnu/packages/julia-xyz.scm

@@ -560,3 +560,27 @@ predictable access patterns.")
     (description "Convenience functions for working with missing values in
 Julia.")
     (license license:expat)))
+
+(define-public julia-orderedcollections
+  (package
+    (name "julia-orderedcollections")
+    (version "1.1.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/JuliaCollections/OrderedCollections.jl")
+             ;; They added Package.toml after the 1.1.0 tag
+             (commit "7a789d72a40f4c446f59575f5d77a63df4391a24")))
+       (file-name "OrderedCollections")
+       (sha256
+        (base32 "09b3mlzkxcbc8wn0pji73591865li07q4kvvfzn9x4256mw47riq"))))
+    (build-system julia-build-system)
+    (home-page "https://github.com/JuliaCollections/OrderedCollections.jl")
+    (synopsis "Julia implementation of associative containers that preserve
+insertion order")
+    (description "This package implements OrderedDicts and OrderedSets, which
+are similar to containers in base Julia.  However, during iteration the
+Ordered* containers return items in the order in which they were added to the
+collection.")
+    (license license:expat)))