[NodeJS][TS7031] error when hookup nodejs client to dashboards

[ananzh]

Describe the bug
See one TS7031 errors when hook up nodejs to dashboards (related issue here ). Details are:

• core_usage_data_service.ts

src/core/server/core_usage_data/core_usage_data_service.ts:118:20 - error TS7031: Binding element 'body' implicitly has an 'any' type. 118  .then(({ body }) => {

To Reproduce
Hook up nodejs client to dashboards using node-14. I have a hooked up branch here. Then after removind node-modules, run yarn osd bootstrap.

Expected behavior
Fix the error.