Bump @slack/web-api from 7.3.1 to 7.9.3 (#164)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Nick Amoscato <[email protected]>

Author: dependabot[bot]