[INTERNAL] Push down dependencies into requiring packages so that errors show up early

[silkentrance]

ATM we have top level dependencies in our private package that are shared with the other packages.

In the past it showed that errors popped up late in the development cycle, concerning package dependencies.

All package dependencies that are not needed by the top level package must therefore be pushed down into the respective requiring packages.

E.g. @types/mocha is not required by packages other than @testdeck/mocha on so on. Similarly so nyc, eslint and so on.

At the top level we only require lerna and supplemental lerna packages such as lerna-changelog and so on.