Substrate Companion for rust 1.54 (#3807)

* Substrate Companion for rust 1.54

* CI: run with a staging CI image

* Revert "CI: run with a staging CI image"

This reverts commit f3b51da0a4c0ffa43b576af5482a2be256948870.

* CI: debug, again

* compilation fixes

* tabify

* update Substrate

* Update .gitlab-ci.yml

* CI: add ubuntu-based image with npm

Co-authored-by: Denis P <[email protected]>
Co-authored-by: Andronik Ordian <[email protected]>
Co-authored-by: thiolliere <[email protected]>
Co-authored-by: parity-processbot <>