Add dimensionChange event

[IceTank]

This event is useful as not all emitted respawn events mean a dimension change. This event also emits when a login packet is send as not all login packets cause a spawn event to be emitted.

This pull request also changes some inconsistencies in how dimensions are named. Previously the nether and the end where sometimes refereed to as nether and end instead of the_nether and the_end. Minecraft always named them as the_nether and the_end.
This pull request also fixes a bug where worldName would sometimes not change after a dimension has been changed.

[IceTank]

I fixed failing tests locally. Can push later.

[rom1504]

waiting for fix

[rom1504]

/fixlint

[rom1504bot]

I fixed all linting errors with npm run fix!

[rom1504]

CI is failing, errors are relevant to the change here

[IceTank]

Yes Ill look more into it. It works for me but maybe the github runner needs more time for some stuff.

[rom1504]

  2) mineflayer_external 1.14.4v
       nether nether dimension change event:

      AssertionError [ERR_ASSERTION]: 'overworld' == 'the_nether'

and raytrace test failures

doesn't seem like timing to me

[MrFiend179]

are you sure its the_nether and not world_nether?

[extremeheat]

I updated the tests to use the proper assertion methods, so it's easier to see the test mismatches. Could be that the dimension rename is breaking things