chore(instr-runtime-node): update some deps to same versions as other contrib packages (#1994)

- reduce 'mocha' dep to v7 used by all other packages
- bump /api peer dep to 1.3.0 (the version when api-metrics was merged into api)

Co-authored-by: Marc Pichler <marc.pichler@dynatrace.com>

Author: trentm