emacs-xyz: add emacs-rego-mode

adam/packages/emacs-xyz.scm

@@ -47,3 +47,21 @@ your favorite ruby mode: (add-hook ruby-mode-hook #'rufo-minor-mode)")
    (synopsis "Syntax highlighting for Caddyfile")
    (description "This package provides syntax highlighting for Caddyfiles")
    (license #f)))
+
+(define-public emacs-rego-mode
+  (package
+   (name "emacs-rego-mode")
+   (version "0.0.0-be110e6c")
+   (source (origin
+	    (method git-fetch)
+	    (uri (git-reference
+		  (url "https://github.com/adammohammed/rego-mode")
+		  (commit "be110e6cef5d34eef0529a8739c68e619cf15310")))
+	    (sha256
+	     (base32 "1s9kbav5wbyividn9zncd153h89nil0i9aj9hgxa95q9fy84r23w"))))
+   (build-system emacs-build-system)
+   (inputs (list emacs-loop))
+   (home-page "https://github.com/adammohammed/rego-mode")
+   (synopsis "Emacs major mode for OPA's rego language")
+   (description "")
+   (license license:gpl3+)))