fix(TS): add waitForElementToBeRemoved to index typings (#254)

Author: alfrescian

typings/index.d.ts

@@ -11,6 +11,7 @@ export * from './query-helpers'
 export * from './wait'
 export * from './wait-for-dom-change'
 export * from './wait-for-element'
+export * from './wait-for-element-to-be-removed'
 export * from './matches'
 export * from './get-node-text'
 export * from './events'