feat! (stores): :sparkles: Async Stores

[whizzzkid]

In this PR:

• Introduced Async Stores.
• These are needed for the ipfs-companion's async localstorage api, chrome.storage.local.get ...
• Since this now supports async stores, the property initDone is now public.
• Fixed types being exported in the public dist, i.e. dist refers to types from ../types/index.d.ts but it's not actually shipped. Added a typings folder and moved the shared types to .ts file, which fixes this (tsc does not touch .d.ts files)
• Introducing this as a breaking change as this might break existing refs.

[github-actions[bot]]

:tada: This PR is included in version 2.0.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: