Bump pub to 196e89e5716d64b2954021e6ac9bb5a20d975fc6

Changes:
```
> git log --format="%C(auto) %h %s" b615e9e..196e89e
 https://dart.googlesource.com/pub.git/+/196e89e5 Make --example be the default (3856)

```

Diff: https://dart.googlesource.com/pub.git/+/b615e9e1f5c5c525c23b08c0e7ff42599c9dcbea..196e89e5716d64b2954021e6ac9bb5a20d975fc6/
Change-Id: I745d5154a5c0b223e413c62eafd90f5a0a06a0a4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/292323
Reviewed-by: Jonas Jensen <[email protected]>
Commit-Queue: Sigurd Meldgaard <[email protected]>

Author: sigurdm

CHANGELOG.md

@@ -282,7 +282,7 @@ using Dart version 2.19, before upgrading to Dart version 3.0.
 
 #### Pub
 
-- To preserve compatibility with null-safe code pre Dart 3 Pub will interpret a
+- To preserve compatibility with null-safe code pre Dart 3, Pub will interpret a
   language constraint indicating a language version of `2.12` or higher and an
   upper bound of `<3.0.0` as `<4.0.0`.
 
@@ -294,6 +294,9 @@ using Dart version 2.19, before upgrading to Dart version 3.0.
   2.1](https://www.rfc-editor.org/rfc/rfc6750#section-2.1). This means they must
   contain only the characters: `^[a-zA-Z0-9._~+/=-]+$`. Before a failure would
   happen when attempting to send the authorization header.
+- `dart pub get` and related commands will now by default also update the
+  dependencies in the `example` folder (if it exists). Use `--no-example` to
+  avoid this.
 
 ## 2.19.4 - 2023-03-08
 

DEPS

@@ -156,7 +156,7 @@ vars = {
   "path_rev": "24b58a2499440cc3d12d2b3c2f52b95f91ff1c0a",
   "pool_rev": "694cfd867d8d84857fc42a8d07933013f0d25305",
   "protobuf_rev": "b90a4c44d56075eb23ee38ae56ce0febfd7f280f",
-  "pub_rev": "b615e9e1f5c5c525c23b08c0e7ff42599c9dcbea", # disable rev_sdk_deps.dart
+  "pub_rev": "196e89e5716d64b2954021e6ac9bb5a20d975fc6", # disable rev_sdk_deps.dart
   "pub_semver_rev": "c0e6ea74ccfbfdb2ef54c7cd9ad31455ca8e481f",
   "shelf_rev": "9a792b49f07bd9d310d83cd103035cc60a9956af",
   "source_map_stack_trace_rev": "45ea3688b6bec1eb565c38c4e28f37b01f8a0fa9",