update CI; prep for publishing (dart-lang/stream_transform#155)

diff --git a/pkgs/stream_transform/.github/dependabot.yaml b/pkgs/stream_transform/.github/dependabot.yaml
new file mode 100644
index 0000000..2144819
--- /dev/null
+++ b/pkgs/stream_transform/.github/dependabot.yaml
@@ -0,0 +1,8 @@
+# Dependabot configuration file.
+version: 2
+
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
diff --git a/pkgs/stream_transform/.github/dependabot.yml b/pkgs/stream_transform/.github/dependabot.yml
deleted file mode 100644
index 430a85e..0000000
--- a/pkgs/stream_transform/.github/dependabot.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-# Set update schedule for GitHub Actions
-# See https://docs.github.com/en/free-pro-team@latest/github/administering-a-repository/keeping-your-actions-up-to-date-with-dependabot
-
-version: 2
-updates:
-
-- package-ecosystem: "github-actions"
-  directory: "/"
-  schedule:
-    # Check for updates to GitHub Actions every weekday
-    interval: "daily"
diff --git a/pkgs/stream_transform/.github/workflows/test-package.yml b/pkgs/stream_transform/.github/workflows/test-package.yml
index 02bf25d..3aa30d4 100644
--- a/pkgs/stream_transform/.github/workflows/test-package.yml
+++ b/pkgs/stream_transform/.github/workflows/test-package.yml
@@ -22,8 +22,8 @@
       matrix:
         sdk: [dev]
     steps:
-      - uses: actions/checkout@v3
-      - uses: dart-lang/setup-dart@v1
+      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+      - uses: dart-lang/setup-dart@6a218f2413a3e78e9087f638a238f6b40893203d
         with:
           sdk: ${{ matrix.sdk }}
       - id: install
@@ -49,8 +49,8 @@
         os: [ubuntu-latest]
         sdk: [2.14.0, dev]
     steps:
-      - uses: actions/checkout@v3
-      - uses: dart-lang/setup-dart@v1
+      - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+      - uses: dart-lang/setup-dart@6a218f2413a3e78e9087f638a238f6b40893203d
         with:
           sdk: ${{ matrix.sdk }}
       - id: install
diff --git a/pkgs/stream_transform/CHANGELOG.md b/pkgs/stream_transform/CHANGELOG.md
index a00b3ba..f425a1a 100644
--- a/pkgs/stream_transform/CHANGELOG.md
+++ b/pkgs/stream_transform/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.0.1-dev
+## 2.0.1
 
 - Require Dart 2.14 or greater.
 - Wait for the future returned from `StreamSubscription.cancel()` before
diff --git a/pkgs/stream_transform/README.md b/pkgs/stream_transform/README.md
index ee0ac2e..b574293 100644
--- a/pkgs/stream_transform/README.md
+++ b/pkgs/stream_transform/README.md
@@ -1,11 +1,12 @@
 [![Build Status](https://travis-ci.org/dart-lang/stream_transform.svg?branch=master)](https://travis-ci.org/dart-lang/stream_transform)
 [![Pub package](https://img.shields.io/pub/v/stream_transform.svg)](https://pub.dev/packages/stream_transform)
+[![package publisher](https://img.shields.io/pub/publisher/stream_transform.svg)](https://pub.dev/packages/stream_transform/publisher)
 
 Extension methods on `Stream` adding common transform operators.
 
-# Operators
+## Operators
 
-## asyncMapBuffer, asyncMapSample, concurrentAsyncMap
+### asyncMapBuffer, asyncMapSample, concurrentAsyncMap
 
 Alternatives to `asyncMap`. `asyncMapBuffer` prevents the callback from
 overlapping execution and collects events while it is executing.
@@ -16,70 +17,70 @@
 Like `asyncMap` but events are buffered in a List until previous events have
 been processed rather than being called for each element individually.
 
-## asyncWhere
+### asyncWhere
 
 Like `where` but allows an asynchronous predicate.
 
-## audit
+### audit
 
 Waits for a period of time after receiving a value and then only emits the most
 recent value.
 
-## buffer
+### buffer
 
 Collects values from a source stream until a `trigger` stream fires and the
 collected values are emitted.
 
-## combineLatest, combineLatestAll
+### combineLatest, combineLatestAll
 
 Combine the most recent event from multiple streams through a callback or into a
 list.
 
-## debounce, debounceBuffer
+### debounce, debounceBuffer
 
 Prevents a source stream from emitting too frequently by dropping or collecting
 values that occur within a given duration.
 
-## followedBy
+### followedBy
 
 Appends the values of a stream after another stream finishes.
 
-## merge, mergeAll, concurrentAsyncExpand
+### merge, mergeAll, concurrentAsyncExpand
 
 Interleaves events from multiple streams into a single stream.
 
-## scan
+### scan
 
 Scan is like fold, but instead of producing a single value it yields each
 intermediate accumulation.
 
-## startWith, startWithMany, startWithStream
+### startWith, startWithMany, startWithStream
 
 Prepend a value, an iterable, or a stream to the beginning of another stream.
 
-## switchMap, switchLatest
+### switchMap, switchLatest
 
 Flatten a Stream of Streams into a Stream which forwards values from the most
 recent Stream
 
-## takeUntil
+### takeUntil
 
 Let values through until a Future fires.
 
-## tap
+### tap
 
 Taps into a single-subscriber stream to react to values as they pass, without
 being a real subscriber.
 
-## throttle
+### throttle
 
 Blocks events for a duration after an event is successfully emitted.
 
-## whereType
+### whereType
 
 Like `Iterable.whereType` for a stream.
 
-### Comparison to Rx Operators
+## Comparison to Rx Operators
 
 The semantics and naming in this package have some overlap, and some conflict,
 with the [ReactiveX](https://reactivex.io/) suite of libraries. Some of the
@@ -125,7 +126,7 @@
 [debounce]:https://pub.dev/documentation/stream_transform/latest/stream_transform/RateLimit/debounce.html
 [throttle]:https://pub.dev/documentation/stream_transform/latest/stream_transform/RateLimit/throttle.html
 
-# Getting a `StreamTransformer` instance
+## Getting a `StreamTransformer` instance
 
 It may be useful to pass an instance of `StreamTransformer` so that it can be
 used with `stream.transform` calls rather than reference the specific operator
diff --git a/pkgs/stream_transform/pubspec.yaml b/pkgs/stream_transform/pubspec.yaml
index 4b58ddf..1815178 100644
--- a/pkgs/stream_transform/pubspec.yaml
+++ b/pkgs/stream_transform/pubspec.yaml
@@ -1,7 +1,7 @@
 name: stream_transform
+version: 2.0.1
 description: A collection of utilities to transform and manipulate streams.
 repository: https://github.com/dart-lang/stream_transform
-version: 2.0.1-dev
 
 environment:
   sdk: ">=2.14.0 <3.0.0"