Update go dependencies

vendor/cloud.google.com/go/old-news.md

@@ -1,3 +1,105 @@
+_February 26, 2018_
+
+*v0.19.0*
+
+- bigquery:
+  - Support customer-managed encryption keys.
+
+- bigtable:
+  - Improved emulator support.
+  - Support GetCluster.
+
+- datastore:
+  - Add general mutations.
+  - Support pointer struct fields.
+  - Support transaction options.
+
+- firestore:
+  - Add Transaction.GetAll.
+  - Support document cursors.
+
+- logging:
+  - Support concurrent RPCs to the service.
+  - Support per-entry resources.
+
+- profiler:
+  - Add config options to disable heap and thread profiling.
+  - Read the project ID from $GOOGLE_CLOUD_PROJECT when it's set.
+
+- pubsub:
+  - BEHAVIOR CHANGE: Release flow control after ack/nack (instead of after the
+    callback returns).
+  - Add SubscriptionInProject.
+  - Add OpenCensus instrumentation for streaming pull.
+
+- storage:
+  - Support CORS.
+
+
+_January 18, 2018_
+
+*v0.18.0*
+
+- bigquery:
+  - Marked stable.
+  - Schema inference of nullable fields supported.
+  - Added TimePartitioning to QueryConfig.
+
+- firestore: Data provided to DocumentRef.Set with a Merge option can contain
+  Delete sentinels.
+
+- logging: Clients can accept parent resources other than projects.
+
+- pubsub:
+  - pubsub/pstest: A lighweight fake for pubsub. Experimental; feedback welcome.
+  - Support updating more subscription metadata: AckDeadline,
+    RetainAckedMessages and RetentionDuration.
+
+- oslogin/apiv1beta: New client for the Cloud OS Login API.
+
+- rpcreplay: A package for recording and replaying gRPC traffic.
+
+- spanner:
+  - Add a ReadWithOptions that supports a row limit, as well as an index.
+  - Support query plan and execution statistics.
+  - Added [OpenCensus](http://opencensus.io) support.
+
+- storage: Clarify checksum validation for gzipped files (it is not validated
+  when the file is served uncompressed).
+
+
+_December 11, 2017_
+
+*v0.17.0*
+
+- firestore BREAKING CHANGES:
+  - Remove UpdateMap and UpdateStruct; rename UpdatePaths to Update.
+    Change
+        `docref.UpdateMap(ctx, map[string]interface{}{"a.b", 1})`
+    to
+        `docref.Update(ctx, []firestore.Update{{Path: "a.b", Value: 1}})`
+
+    Change
+        `docref.UpdateStruct(ctx, []string{"Field"}, aStruct)`
+    to
+        `docref.Update(ctx, []firestore.Update{{Path: "Field", Value: aStruct.Field}})`
+  - Rename MergePaths to Merge; require args to be FieldPaths
+  - A value stored as an integer can be read into a floating-point field, and vice versa.
+- bigtable/cmd/cbt:
+  - Support deleting a column.
+  - Add regex option for row read.
+- spanner: Mark stable.
+- storage:
+  - Add Reader.ContentEncoding method.
+  - Fix handling of SignedURL headers.
+- bigquery:
+  - If Uploader.Put is called with no rows, it returns nil without making a
+    call.
+  - Schema inference supports the "nullable" option in struct tags for
+    non-required fields.
+  - TimePartitioning supports "Field".
+
+
 _October 30, 2017_
 
 *v0.16.0*