Update npm dependencies
Optimise SVG with SVGO 0.4.5
Update scss-lint and Sass
Conform to new linting rule
Merge branch 'master' of github.com:guardian/frontend into update-dependencies

Conflicts:
	common/app/assets/images/global/arrow-white-right.svg
	common/app/assets/images/global/back.svg
	common/app/assets/images/global/close-icon.svg
	common/app/assets/images/global/guardian-logo-big.svg
Optimise SVG
Revert "Optimise SVG"

This reverts commit 8edd90f491e45b7b6c031929c6813d25ba04eaf0.
Revert "Update npm dependencies"

This reverts commit b4e3992fb2f60786e2da02f8170e180043158675.
Revert "Optimise SVG with SVGO 0.4.5"

This reverts commit 78e3b274273f0661359170d7a333b2acd4646be5.

Conflicts:
	common/app/assets/images/global/arrow-white-right.svg
	common/app/assets/images/global/back.svg
	common/app/assets/images/global/close-icon.svg
	common/app/assets/images/global/guardian-logo-big.svg
Merge branch 'master' of github.com:guardian/frontend into update-dependencies
Force SVGO 0.4.4
Optimise big logo
Merge branch 'master' of github.com:guardian/frontend into update-dependencies
Merge pull request #5393 from guardian/update-dependencies

Update npm and ruby dependencies