gnu: emacs-js2-mode: Update to 20201220.

* gnu/packages/emacs-xyz.scm (emacs-js2-mode): Update to 20201220.

gnu/packages/emacs-xyz.scm

@@ -8171,33 +8171,31 @@ to all the other commands, too.")
     (license license:gpl3+)))
 
 (define-public emacs-js2-mode
-  (let ((commit "40aab27581279d0fdbfeb9afeb85f39d401a927f")
-        (revision "1"))
-    (package
-      (name "emacs-js2-mode")
-      (version (git-version "20190219" revision commit))
-      (source
-       (origin
-         (method git-fetch)
-         (uri (git-reference
-               (url "https://github.com/mooz/js2-mode")
-               (commit commit)))
-         (file-name (git-file-name name version))
-         (sha256
-          (base32 "0ysd0ji3vvk2zpjcg1wl7b2hva8471vq0ypib4h6spnpjdr43vzk"))))
-      (build-system emacs-build-system)
-      (arguments
-       `(#:tests? #t
-         #:test-command '("make" "test")))
-      (home-page "https://github.com/mooz/js2-mode/")
-      (synopsis "Improved JavaScript editing mode for Emacs")
-      (description
-       "Js2-mode provides a JavaScript major mode for Emacs that is more
+  (package
+    (name "emacs-js2-mode")
+    (version "20201220")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/mooz/js2-mode")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "00jy917cgp5xzfgs4m0spzlbqk8mg63layin8nxmn2647rfjnik4"))))
+    (build-system emacs-build-system)
+    (arguments
+     `(#:tests? #t
+       #:test-command '("make" "test")))
+    (home-page "https://github.com/mooz/js2-mode/")
+    (synopsis "Improved JavaScript editing mode for Emacs")
+    (description
+     "Js2-mode provides a JavaScript major mode for Emacs that is more
 advanced than the built-in javascript-mode.  Features include accurate syntax
 highlighting using a recursive-descent parser, on-the-fly reporting of syntax
 errors and strict-mode warnings, smart line-wrapping within comments and
 strings, and code folding.")
-      (license license:gpl3+))))
+    (license license:gpl3+)))
 
 (define-public emacs-nodejs-repl
   (package