Update the pub version

Includes the following commits:
80ac76400ff58fde3c5a335d860d196c3febe837 Warn about authors field in pubspec.yaml
6b6e02fcdd8094ccbba919b2fdc74947b1cebb71 Warn about old flutter plugin registration format (#2233)
8308acbc48ebd4da4ab7f45169af8dee4df18e79 Language versioning
b18d4f6a5d035f4f72ef187e9cdb133d18848c2d update doc
408bdd58ab01689fd82cc036b4142f7b592b4ba0 Added utility for faster local testing (#2235)
055fc19d2e06e819dbd47b3b56909c47bd893f66 Upgraded package:yaml to 2.2.0 (#2237)
0f3baf7abb13702f7fb1ff3709c584065df1435c Remove unused Map `availableVersions`
cfa9dc760b6b601f9473e65d15f15b60a319336d Fix to show proper error message when git is not installed (#2209)
d99b0d58f4059d7bb4ac4616fd3d54ec00a2b5d4 Rephrase warnings for missing deps (#2203)
76b8c30395b37f96d3db3e842344cc842bdd7c24 Don't mention 'transformed dependencies'. (#2199)
4bd65e0f54e6e4540f03467b0272a5666e8d54ba return the hashCode of the description (#2198)
92b52682e8fc6eed9ef2e77ed890647f75570165 Test more pre-release behavior. (#2175)
066ac118d406500f672339e25f0154af9321deac update to latest pkg:analyzer (#2172)
289804a5d2c9746b4e86c271c2abcfe17417e20f Minor typo fixed (#2166)

Change-Id: I3922bcaacb5399853a291b92d7192d21f719d224
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/123404
Reviewed-by: Jonas Jensen <jonasfj@google.com>
Commit-Queue: Sigurd Meldgaard <sigurdm@google.com>

Author: sigurdm

CHANGELOG.md

@@ -123,6 +123,16 @@ executables. See https://dart.dev/tools/dart2native for additional details.
 
 #### Pub
 
+* `pub get` generates [`.dart_tools/package_config.json`](https://github.com/dart-lang/language/blob/62c036cc41b10fb543102d2f73ee132d1e2b2a0e/accepted/future-releases/language-versioning/package-config-file-v2.md)
+  in addition to `.packages` to support language versioning.
+
+* `pub publish` now warns about the old flutter plugin registration format.
+
+* `pub publish` now warns about the `author` field in pubspec.yaml being.
+  obsolete.
+
+* Show a proper error message when `git` is not installed.
+
 #### Linter
 
 The Linter was updated to `0.1.101`, which includes:

DEPS

@@ -118,7 +118,7 @@ vars = {
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
   "pool_tag": "1.3.6",
   "protobuf_rev": "3746c8fd3f2b0147623a8e3db89c3ff4330de760",
-  "pub_rev": "df0f72daaa724e29ed6075e0fb5549a6d6dc5daf",
+  "pub_rev": "80ac76400ff58fde3c5a335d860d196c3febe837",
   "pub_semver_tag": "1.4.2",
   "quiver-dart_tag": "2.0.0+1",
   "resource_rev": "f8e37558a1c4f54550aa463b88a6a831e3e33cd6",