message: docs: add notifier breaking changes
  Closes
diff: @@ -193,10 +193,22 @@ This document contains a detailed list of changes between RxJS 6.x and RxJS 7.x,
  ## Breaking Changes
  +### audit
  +
  +- The observable returned by the `audit` operator's duration selector must emit a next notification to end the duration. Complete notifications no longer end the duration.
  +
  ### buffer
  - `buffer` now subscribes to the source observable before it subscribes to the closing notifier. Previously, it subscribed to the closing notifier first.
  +### bufferToggle
  +
  +- The observable returned by the `bufferToggle` operator's closing selector must emit a next notification to close the buffer. Complete notifications no longer close the buffer.
  +
  +### bufferWhen
  +
  +- The observable returned by the `bufferWhen` operator's closing selector must emit a next notification to close the buffer. Complete notifications no longer close the buffer.
  +
  ### combineLatest
  - Generic signatures have changed. Do not explicitly pass generics.
  @@ -214,10 +226,18 @@ This document contains a detailed list of changes between RxJS 6.x and RxJS 7.x,
  - Generic signatures have changed. Do not explicitly pass generics.
  +### debounce
  +
  +- The observable returned by the `debounce` operator's duration selector must emit a next notification to end the duration. Complete notifications no longer end the duration.
  +
  ### defaultIfEmpty
  - Generic signatures have changed. Do not explicitly pass generics.
  +### delayWhen
  +
  +- `delayWhen` will no longer emit if the duration selector simply completes without a value. Notifiers must notify with a value, not a completion.
  +
  ### endWith
  - Generic signatures have changed. Do not explicitly pass generics.
  @@ -247,6 +267,10 @@ This document contains a detailed list of changes between RxJS 6.x and RxJS 7.x,
  - Generic signatures have changed. Do not explicitly pass generics.
  +### sample
  +
  +- The `sample` operator's notifier observable must emit a next notification to effect a sample. Complete notifications no longer effect a sample.
  +
  ### scan
  - Generic signatures have changed. Do not explicitly pass generics.
  @@ -263,6 +287,14 @@ This document contains a detailed list of changes between RxJS 6.x and RxJS 7.x,
  - Generic signatures have changed. Do not explicitly pass generics.
  +### throttle
  +
  +- The observable returned by the `throttle` operator's duration selector must emit a next notification to end the duration. Complete notifications no longer end the duration.
  +
  +### windowToggle
  +
  +- The observable returned by the `windowToggle` operator's closing selector must emit a next notification to close the window. Complete notifications no longer close the window.
  +
  ### withLatestFrom
  - Generic signatures have changed. Do not explicitly pass generics.
  