Update the versions of several `devDependencies` in `package.json`....

Update the versions of several `devDependencies` in `package.json`. `grunt-cssjanus` has been updated to `0.2.2`, we no longer need the fork. Run `npm install` to receive updates for `node_modules` in the project root.

Props yoavf, TobiasBg.
Fixes #26073.


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