Notice that azblob also had to be upgraded to 0.4.1, otherwise we hit
the following build issue:
vendor/github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/zc_blob_lease_client.go:25:16: undefined: to.StringPtr
vendor/github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/zc_block_blob_client.go:145:20: undefined: to.StringPtr
vendor/github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/zc_container_lease_client.go:25:16: undefined: to.StringPtr
vendor/github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/zc_shared_policy_shared_key_credential.go:190:17: undefined: log.EventResponse
vendor/github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/zm_lease_request_options.go:63:16: undefined: to.StringPtr
vendor/github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/zm_lease_request_options.go:142:16: undefined: to.StringPtr
and newer versions cause
pkg/gather/azure/azure.go:224:29: undefined: azblob.NewBlobClientWithSharedKey
pkg/gather/azure/azure.go:235:48: unknown field 'MaxRetryRequests' in struct literal of type blob.RetryReaderOptions