fix: update node-sass to support node12+

[arththebird]

Proposed changes:

• Update node-sass to ^7.0.3 to support node12, node14, node16 and node17. See compatibility table here

Status (please check what you already did):

• [X] made PR ready for code review
• [ ] added some tests for the functionality
• [ ] updated the documentation
• [ ] updated the changelog