v0.3.0

• 65% speed increase of scan
• Updated benchmark to use more realistic data - https://github.com/rocicorp/replicache-sdk-js/pull/115/commits
• Re-fire subscriptions when mutations happen in other tabs
• Add Replicache.scanAll() convenience method (does the async iteration for you)
• Add new todo-lit sample based on lit-html and es6
• Remove list() and drop() APIs as not very compatible with indexeddb