add justlife4x4 as a contributor for security (OpenMage#4657)

* update README.md

* update .all-contributorsrc

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Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

Sanitize skin urls that could be used for XSS (OpenMage#4654)

Co-authored-by: kiatng <[email protected]>

No Layout on Redirect in CatalogSearch AdvancedController (OpenMage#4494

)

Closes OpenMage#3389

Co-authored-by: Sven Reichel <[email protected]>

Fix: error in admin customer edit account (OpenMage#4488)

Fixes grid column type `concat` (OpenMage#4476)

* Fixes grid column type `concat`

* removed useless test

Bump version to v20.11.0 (OpenMage#4425)

* bump version

* Typo fix

bump version

fix codestyle - empty line (OpenMage#4112)

Fixed null parameter warning in Mage_Wishlist_Block_Abstract (OpenMag…

…e#4068)

Co-authored-by: Fabrizio Balliano <[email protected]>

Version bump