* udpate jest, jest-cli, @types/jest to v24
* fix type error in kibana-i18n package
* return serivce explicitly to fix typings
* add explicit never
* suppress typings errors
* update jest versions in x-pack
* make tests in x-pack more robust and fix incompatibility
* suppress CallCluster mock typings
Mock interface doesn't match CallCluster. Requires
additional work
* x-pack. resolve other typing conflicts
* remove unused types/jest
* fix snapshots
* restore mocks after jest.spyOn
* remove outdated definitions for jest
* cleanup x-pack package.json and update @types/jest
* fix tests merged from master
* updated yarn.lock and log errors for scripts/type_check
* This commit fixes error in TS, which failed on parsing the file.
* suppress type errors from master
* jest-cli is devDep