change tests and nips to use the new api.

index.ts

@@ -1,6 +1,6 @@
-export * from './keys.ts'
+export * from './pure.ts'
 export * from './relay.ts'
-export * from './event.ts'
+export * from './pure.ts'
 export * from './filter.ts'
 export * from './pool.ts'
 export * from './references.ts'