Update backend dependencies

Possibly interesting changes:

Azure/azure-sdk-for-go#14521
Retry on HTTP client errors

minio/minio-go#1452
fix: make sure getObject returns error on truncated responses

golang/net@f585440
http2: close Transport connection on write errors

go.mod

@@ -2,8 +2,8 @@ module github.com/restic/restic
 
 require (
 	bazil.org/fuse v0.0.0-20200407214033-5883e5a4b512
-	cloud.google.com/go/storage v1.12.0
-	github.com/Azure/azure-sdk-for-go v46.1.0+incompatible
+	cloud.google.com/go/storage v1.16.0
+	github.com/Azure/azure-sdk-for-go v55.6.0+incompatible
 	github.com/Azure/go-autorest/autorest v0.11.6 // indirect
 	github.com/Azure/go-autorest/autorest/to v0.4.0 // indirect
 	github.com/cenkalti/backoff/v4 v4.0.2
@@ -12,33 +12,32 @@ require (
 	github.com/dnaeon/go-vcr v1.0.1 // indirect
 	github.com/elithrar/simple-scrypt v1.3.0
 	github.com/go-ole/go-ole v1.2.4
-	github.com/google/go-cmp v0.5.2
-	github.com/google/uuid v1.1.2 // indirect
+	github.com/gofrs/uuid v4.0.0+incompatible // indirect
+	github.com/google/go-cmp v0.5.6
 	github.com/gopherjs/gopherjs v0.0.0-20200217142428-fce0ec30dd00 // indirect
 	github.com/hashicorp/golang-lru v0.5.4
 	github.com/juju/ratelimit v1.0.1
 	github.com/kr/text v0.2.0 // indirect
 	github.com/kurin/blazer v0.5.3
-	github.com/minio/minio-go/v7 v7.0.5
+	github.com/minio/minio-go/v7 v7.0.12
 	github.com/minio/sha256-simd v0.1.1
-	github.com/ncw/swift v1.0.52
+	github.com/ncw/swift v1.0.53
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/pkg/profile v1.5.0
 	github.com/pkg/sftp v1.13.0
 	github.com/pkg/xattr v0.4.2
 	github.com/restic/chunker v0.4.0
-	github.com/satori/go.uuid v1.2.0 // indirect
 	github.com/smartystreets/assertions v1.2.0 // indirect
 	github.com/spf13/cobra v1.1.3
 	github.com/spf13/pflag v1.0.5
 	golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83
-	golang.org/x/net v0.0.0-20200904194848-62affa334b73
-	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208
-	golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b
-	golang.org/x/text v0.3.4
-	google.golang.org/api v0.32.0
+	golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420
+	golang.org/x/oauth2 v0.0.0-20210628180205-a41e5a781914
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
+	golang.org/x/sys v0.0.0-20210616094352-59db8d763f22
+	golang.org/x/text v0.3.6
+	google.golang.org/api v0.50.0
 	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
 	gopkg.in/ini.v1 v1.61.0 // indirect
 	gopkg.in/tomb.v2 v2.0.0-20161208151619-d5d1b5820637