Update versions of Grunt modules in package.json

[TobiasBg]

Since adopting Grunt, several Grunt modules that are listed in package.json have been updated. The attached patch updates their version numbers in package.json, so that we can benefit from the respective up-to-date and stable versions.

[TobiasBg]

Update Grunt modules

[TobiasBg]

The refreshed 26073.2.patch has the latest versions.

[mjbanks]

Updated to latest package versions as of Jan. 17

[TobiasBg]

Refreshed patch, Jan. 19

[TobiasBg]

@mjbanks: Thanks for the refreshed patch! Unfortunately, it seems to be breaking some stuff (remove grunt-contrib-copy, add a second line for grunt), and it doesn't yet take [26977] into account (which happened just one hour after you submitted your patch), so I refreshed the patch again, see 26073.4.patch.

[mjbanks]

@TobiasBg - ah good call!

[yoavf]

I updated the patch with 26073.5.patch, as I've just released grunt-cssjanus 0.2.2 - we no longer need our fork there.
Tested by comparing RTL files output pre/after patch - no diffs.

[wonderboymusic]

In 27053:

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.