gnu: ruby-minitest: Update to 5.11.3.

As the previous version breaks the tests for the ruby-minitest-reporters
package I'd like to add.

* gnu/packages/ruby.scm (ruby-minitest): Update to 5.11.3.

gnu/packages/ruby.scm

@@ -2254,13 +2254,13 @@ client protocol.")
 (define-public ruby-minitest
   (package
     (name "ruby-minitest")
-    (version "5.10.3")
+    (version "5.11.3")
     (source (origin
               (method url-fetch)
               (uri (rubygems-uri "minitest" version))
               (sha256
                (base32
-                "05521clw19lrksqgvg2kmm025pvdhdaniix52vmbychrn2jm7kz2"))))
+                "0icglrhghgwdlnzzp4jf76b0mbc71s80njn5afyfjn4wqji8mqbq"))))
     (build-system ruby-build-system)
     (native-inputs
      `(("ruby-hoe" ,ruby-hoe)))