Bump dependencies in the lock file

[lbalmaceda]

Changes

• Bumps the dependency versions respecting the package.json file contents.
• Changes the CI script Node version from 8 to LTS

[lbalmaceda]

Getting the following error on the CI

error mkdirp@1.0.4: The engine "node" is incompatible with this module. Expected version ">=10". Got "8.17.0"
error Found incompatible module.

I've traced the mkdirp > 1.0.0 requirement to:

jsdoc-to-markdown -> dmd -> cache-point ->mkdirp

which we require here as dev dependency. https://github.com/auth0/react-native-auth0/blob/master/package.json#L40

I'll update the package.json file to specify the min engine required, and if required, the CI script to run tests with Node 10