Consider renaming 'load' and 'unload'

[JamesMGreene]

Is your feature request related to a problem? Please describe.

The terminology in use for opening and closing the database does not seem ideal.

For opening:

• new Datastore({ autoload: true }) option
• Datastore#load method
• Datastore#loadDatabase method (deprecated)
• Datastore#loaded event

For closing:

• Datastore#unload method
• Datastore#unloaded event

Describe the solution you'd like

I would like to consider shifting it from a "load*"/"unload*" semantic to either an "open*"/"close*" or a "connect*"/"disconnect*" semantic in v3.0.0.

Describe alternatives you've considered

Not changing it.

Additional context

Although I am currently preferring the idea of "open*"/"close*", most other database libraries refer to this as connect/close since they are actually connecting via sockets vs. just loading local files... prior art. 🤷‍♂️