Upgrade neo4j java driver to version 4

[BalmungSan]

Fixes #58

TODO list:

• Upgrade the driver and the docker container.
• Fix compilation errors.
• Fix tests.
• Fix docs.
• Cover all the new API (missing TransactionConfig).

I am still missing this:

• Provide wrappers for the new Rx module.

But I believe that is work for another PR.
This is ready for review.

[PhilAndrew]

Looking forward to this

[dimafeng]

@BalmungSan looks good to me! 🚀 I see that this brings some incompatibilities with the old driver - do you think we need to release it with a new versioning schema (perhaps, bump the major version)?

And just one minor thing that we can address at any point the future - add some info about TransactionConfig to the doc. But it's really minor, so we can merge this PR whenever you're ready.

[BalmungSan]

@dimafeng I added the TransactionConfig docs!

I see that this brings some incompatibilities with the old driver - do you think we need to release it with a new versioning schema.

Yeah, this should be a major release... however, I still do think we are ready to release the 1.0.0 version (at least not until the concurrency issues with Session are resolved #44).
So, I believe we should just release version 0.14.0. BTW, I just added a compatibility matrix to the docs.

Anyways, I will proceed to merge this as well as the pending upgrade dependencies PRs (well, as soon as the GDS library officially publishes its 1.3.0 version) so everything is ready for you to make the new release.