Bump shelf from 1.3.1 to 1.3.2 (#904)

Bumps [shelf](https://github.com/dart-lang/shelf/tree/master/pkgs) from 1.3.1 to 1.3.2.
- [Release notes](https://github.com/dart-lang/shelf/releases)
- [Commits](https://github.com/dart-lang/shelf/commits/shelf-v1.3.2/pkgs)

---
updated-dependencies:
- dependency-name: shelf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/pubspec.lock b/pubspec.lock
index 682be25..8bbe455 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -399,7 +399,7 @@
       name: shelf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.1"
+    version: "1.3.2"
   shelf_packages_handler:
     dependency: transitive
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 42486a9..1431941 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -19,7 +19,7 @@
   protobuf: ^2.1.0
   quiver: ^3.1.0
   resp_client: ^1.2.0
-  shelf: ^1.3.1
+  shelf: ^1.3.2
   shelf_router: ^1.1.3
   yaml: ^3.1.1