gnu: qtcolorwidgets: Update to 2.2.0.

* gnu/packages/qt.scm (qtcolorwidgets): Update to 2.2.0.

gnu/packages/qt.scm

@@ -3741,24 +3741,21 @@ a binding language:
 @end itemize\n")
     (license license:lgpl3)))                    ;version 3 only (+ exception)
 
-;; There have been no public releases yet.
 (define-public qtcolorwidgets
-  (let ((commit "a95f72e935fe9e046061a1d1c3930cbfbcb533e0")
-        (revision "1"))
   (package
     (name "qtcolorwidgets")
-      (version (git-version "0" revision commit))
+    (version "2.2.0")
     (source (origin
               (method git-fetch)
               (uri (git-reference
                     (url "https://gitlab.com/mattia.basaglia/Qt-Color-Widgets")
-                      (commit commit)))
+                    (commit (string-append "v" version))))
               (file-name (git-file-name name version))
               (sha256
                (base32
-                  "0dkiwlqh2gwhlp78c1fmchj3shl4p9inspcl96ya5aa8mn6kydy8"))))
+                "1fp7sr5a56bjp2abc6ng331q0bwvk6mf2nxdga81aj6cd9afs22q"))))
     (build-system cmake-build-system)
-      (arguments `(#:tests? #f)) ; There are no tests
+    (arguments '(#:tests? #f))          ;there are no tests
     (native-inputs
      (list qttools-5))
     (inputs
@@ -3769,7 +3766,7 @@ a binding language:
 user-friendly than the default @code{QColorDialog} and several other
 color-related widgets.")
     ;; Includes a license exception for combining with GPL2 code.
-      (license license:lgpl3+))))
+    (license license:lgpl3+)))
 
 (define-public qcustomplot
   (package