Bump deps

```
* use go 1.17 semantics in go.mod
* pin tonistiigi/fsutil dep to match docker/docker's dep
go get -u ./...
go mod vendor
```

vendor/github.com/aws/smithy-go/document/doc.go

@@ -0,0 +1,12 @@
+// Package document provides interface definitions and error types for document types.
+//
+// A document is a protocol-agnostic type which supports a JSON-like data-model. You can use this type to send
+// UTF-8 strings, arbitrary precision numbers, booleans, nulls, a list of these values, and a map of UTF-8
+// strings to these values.
+//
+// API Clients expose document constructors in their respective client document packages which must be used to
+// Marshal and Unmarshal Go types to and from their respective protocol representations.
+//
+// See the Marshaler and Unmarshaler type documentation for more details on how to Go types can be converted to and from
+// document types.
+package document