all: release v0.54.0
This commit will be tagged v0.54.0.
# Changes
+## v0.54.0
+
+- all:
+ - remove unused golang.org/x/exp from mod file
+ - update godoc.org links to pkg.go.dev
+- compute/metadata:
+ - use defaultClient when http.Client is nil
+ - remove subscribeClient
+- iam:
+ - add support for v3 policy and IAM conditions
+- Various updates to autogenerated clients.
+
## v0.53.0
- all: most clients now use transport/grpc.DialPool rather than Dial (see #1777 for outliers).
