Update dependencies

[suminkimm]

Summary

Update dependencies. Running yarn upgrade was needed to fix the fs-events package.

[princiya]

@suminkimm why do we need all these new dependencies?

The idea is to not use third party dependencies inside rn-tester, which is why you see only 2 dependencies used so far --> invariant and nullthrows. 😄

rn-tester is meant to be run as a sample application to try changes made into the react-native core; having 3rd party dependencies means that the new changes made into the react-native core will not be supported by these 3rd party dependencies. in order to avoid this unnecessary overhead usage of other dependencies is avoided.

cc @mkcode

[suminkimm]

@princiya When I first tried to run RNTester with yarn install, the app didn't run for me. It only ran successfully without errors after I tried yarn upgrade. I'm not sure if I'm the only one having this issue, but @mkcode suggested I make a PR to update the dependencies 😄