all: release v0.53.0, datastore/v1.1.0, bigtable/v1.3.0

This commit will be tagged:
- v0.5.30
- datastore/v1.1.0
- bigtable/v1.3.0

Change-Id: Iece28786a91e92a6d68b96a3e04c0f2cd66742b9
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/51874
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Chris Cotter <cjcotter@google.com>
Reviewed-by: Seth Hollyman <shollyman@google.com>
diff --git a/CHANGES.md b/CHANGES.md
index 8dba920..744d1a2 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,12 @@
 # Changes
 
+## v0.53.0
+
+- all: most clients now use transport/grpc.DialPool rather than Dial (see #1777 for outliers).
+  - Connection pooling now does not use the deprecated (and soon to be removed) gRPC load balancer API.
+- profiler: remove symbolization (drops support for go1.10)
+- Various updates to autogenerated clients.
+
 ## v0.52.0
 
 - internal/gapicgen: multiple improvements related to library generation.
diff --git a/bigtable/CHANGES.md b/bigtable/CHANGES.md
index 0e98b76..c981d7f 100644
--- a/bigtable/CHANGES.md
+++ b/bigtable/CHANGES.md
@@ -1,5 +1,10 @@
 # Changes
 
+## v1.3.0
+
+- Clients now use transport/grpc.DialPool rather than Dial.
+  - Connection pooling now does not use the deprecated (and soon to be removed) gRPC load balancer API.
+
 ## v1.2.0
 
 - Update cbt usage string.
diff --git a/datastore/CHANGES.md b/datastore/CHANGES.md
index 827508d..7fa901e 100644
--- a/datastore/CHANGES.md
+++ b/datastore/CHANGES.md
@@ -1,5 +1,17 @@
 # Changes
 
+## v1.1.0
+
+- DEADLINE_EXCEEDED is now not retried.
+- RunInTransaction now panics more explicitly on a nil TransactionOption.
+- PropertyLoadSaver now tries to Load as much as possible (e.g., Key), even if an error is returned.
+- Client now uses transport/grpc.DialPool rather than Dial.
+  - Connection pooling now does not use the deprecated (and soon to be removed) gRPC load balancer API.
+- Doc updates
+  - Iterator is unsafe for concurrent use.
+  - Mutation docs now describe atomicity and gRPC error codes more explicitly.
+  - Cursor example now correctly uses "DecodeCursor" rather than "NewCursor"
+
 ## v1.0.0
 
 This is the first tag to carve out datastore as its own module. See:
diff --git a/internal/version/version.go b/internal/version/version.go
index 1caf584..6161440 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -26,7 +26,7 @@
 
 // Repo is the current version of the client libraries in this
 // repo. It should be a date in YYYYMMDD format.
-const Repo = "20200202"
+const Repo = "20200212"
 
 // Go returns the Go runtime version. The returned string
 // has no whitespace.