fix: resolve dependabot alerts

update @angular-devkit/build-angular to version 0.1001.2 to resolve:
*node-forge (CVE-2020-7720)
*yargs-parser (GHSA-p9pc-299p-vxgp)
*http-proxy (GHSA-6x33-pw7p-hmpq)
*tree-kill (GHSA-884p-74jh-xrg2)

update node-sass to 4.14.1 (GHSA-9v62-24cr-58cx)

Author: saffaalvi