updated autoprefixer version (#1292)

* updated autoprefixer version

Signed-off-by: EESH-843 <saieeshwar843l@gmail.com>

* revert

* updating autoprefixer to ^10.4.21

* Update package.json

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Signed-off-by: EESH-843 <saieeshwar843l@gmail.com>
Co-authored-by: EESH-843 <saieeshwar843l@gmail.com>

Author: saieeshward