Release preparation v0.26/v0.0.21-alpha (#773)

* bump version for release

* update changelogs

* Fix runtime crate version

* fix comment

* use a 3 segment version

Author: rcoh

CHANGELOG.md

@@ -1,6 +1,9 @@
 vNext (Month Day, Year)
 =======================
 
+v0.26 (October 15th, 2021)
+=======================
+
 **Breaking Changes**
 
 - :warning: The `rust-codegen` plugin now requires a `moduleDescription` in the *smithy-build.json* file. This

aws/SDK_CHANGELOG.md

@@ -1,10 +1,13 @@
 vNext (Month Day, Year)
 =======================
 
+v0.0.21-alpha (October 15th, 2021)
+==================================
+
 **New this week**
 
 - Prepare crate manifests for publishing to crates.io (smithy-rs#755)
-- Add support for IAM Roles for tasks (smithy-rs#765, aws-sdk-rust#123)
+- Add support for IAM Roles for tasks credential provider (smithy-rs#765, aws-sdk-rust#123)
 - All service crates now have generated README files (smithy-rs#766)
 - Update AWS service models (smithy-rs#772)
 - :tada: Add support for Amazon Managed Grafana (smithy-rs#772)
@@ -18,10 +21,6 @@ v0.0.20-alpha (October 7, 2021)
 - `SmithyConnector` and `DynConnector` now return `ConnectorError` instead of `Box<dyn Error>`. If you have written a custom connector, it will need to be updated to return the new error type. (#744)
 - The `DispatchError` variant of `SdkError` now contains `ConnectorError` instead of `Box<dyn Error>` (#744).
 
-**Tasks to cut release**
-
-- [ ] Bump MSRV on aws-sdk-rust, then delete this line.
-
 **New This Week**
 
 - :tada: Make retry behavior configurable

aws/sdk/gradle.properties

@@ -4,13 +4,13 @@
 #
 
 # Version number to use for the generated SDK
-aws.sdk.version=0.0.20-alpha
-smithy.rs.runtime.crate.version=0.25.1-alpha
+# Note: these must always be full 3-segment semver versions
+aws.sdk.version=0.0.21-alpha
+smithy.rs.runtime.crate.version=0.26.0-alpha
 
 # several services are broken pending custom work:
 # Glacier requires a customization which is not currently supported:
 # https://github.com/awslabs/smithy-rs/issues/137
-# IOT data plane requires a signing customization https://github.com/awslabs/smithy-rs/issues/606
 # timestream requires endpoint discovery: https://github.com/awslabs/aws-sdk-rust/issues/114
 aws.services.fullsdk=-glacier,-timestreamwrite,-timestreamquery