gnu: freecad: Update to 0.20.

* gnu/packages/engineering.scm (freecad): Update to 0.20.

gnu/packages/engineering.scm

@@ -2431,23 +2431,18 @@ OpenSCAD code.  It supports syntax highlighting, indenting and refilling of
 comments.")))
 
 (define-public freecad
-  ;; FIXME: We use a commit directly because upstream has compatibility fixes
-  ;; that are not in a release yet for boost, opencascade-occt-7.6 and vtk-9.
-  ;; Switch back to a regular version (probably 0.20) when it is released.
-  (let ((commit "09a05a9cd0c4692a57a3e038268b4389b4657fc6")
-        (revision "0"))
   (package
     (name "freecad")
-      (version (git-version "0.19.3" revision commit))
+    (version "0.20")
     (source
      (origin
        (method git-fetch)
        (uri (git-reference
              (url "https://github.com/FreeCAD/FreeCAD")
-               (commit commit)))
+             (commit version)))
        (file-name (git-file-name name version))
        (sha256
-          (base32 "0818basym0n44dsgix0yv1l00xgv9igrr7wkszd8x74lh1rr591r"))))
+        (base32 "14bn75bjh93f8k3hinqw913z1q0ywq7niklwbbd99hf5n342hsv4"))))
     (build-system qt-build-system)
     (native-inputs
      (list doxygen
@@ -2535,7 +2530,7 @@ customization.")
       license:lgpl2.1+
       license:lgpl2.0+
       license:gpl3+
-        license:bsd-3)))))
+      license:bsd-3))))
 
 (define-public libmedfile
   (package