fix dexie cache filter

[DanConwayDev]

by correcting the event format passed to nostr-tool's matchFilter

the dexie cache adaptor applies some simple filtering for efficiency reasons before using nostr-tool's matchFilter to apply the full NIP-01 ruleset

basic root cause analysis:

it is likely that nostr-tools changed the event format expected by matchFilter and this was missed during a dependancy upgrade for a number of reasons:

1. the use of as any remove type checking
2. nostr-tools doesn't use semantic versioning to highlight breaking changes
3. a cursory test using simple filters would have returned correct results