go.mod: bump azure-storage-blob-go/azblob

Due to Azure/azure-storage-blob-go#236 , we had to
use a weird version of this library (see 1b05192).

A new release came out yesterday that's tagged correctly so let's use it
so we can remove the hack from go.mod.

Signed-off-by: Ondřej Budai <ondrej@budai.cz>

go.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	github.com/Azure/azure-sdk-for-go v41.3.0+incompatible
-	github.com/Azure/azure-storage-blob-go v0.11.1-0.20201209121048-6df5d9af221d
+	github.com/Azure/azure-storage-blob-go v0.13.0
 	github.com/Azure/go-autorest/autorest v0.10.0
 	github.com/Azure/go-autorest/autorest/azure/auth v0.4.2
 	github.com/Azure/go-autorest/autorest/to v0.3.0 // indirect

go.sum

@@ -2,8 +2,8 @@ github.com/Azure/azure-pipeline-go v0.2.3 h1:7U9HBg1JFK3jHl5qmo4CTZKFTVgMwdFHMVt
 github.com/Azure/azure-pipeline-go v0.2.3/go.mod h1:x841ezTBIMG6O3lAcl8ATHnsOPVl2bqk7S3ta6S6u4k=
 github.com/Azure/azure-sdk-for-go v41.3.0+incompatible h1:W5px0x53aa47nmIAuF1XWR1ZzFuUnkJBGUuzHnNp+Nk=
 github.com/Azure/azure-sdk-for-go v41.3.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
-github.com/Azure/azure-storage-blob-go v0.11.1-0.20201209121048-6df5d9af221d h1:YEjZNZ0HS7ITX+BJ7wUXtTk6GXM3g8xftaqQ94XU/cs=
-github.com/Azure/azure-storage-blob-go v0.11.1-0.20201209121048-6df5d9af221d/go.mod h1:A0u4VjtpgZJ7Y7um/+ix2DHBuEKFC6sEIlj0xc13a4Q=
+github.com/Azure/azure-storage-blob-go v0.13.0 h1:lgWHvFh+UYBNVQLFHXkvul2f6yOPA9PIH82RTG2cSwc=
+github.com/Azure/azure-storage-blob-go v0.13.0/go.mod h1:pA9kNqtjUeQF2zOSu4s//nUdBD+e64lEuc4sVnuOfNs=
 github.com/Azure/go-autorest v14.2.0+incompatible h1:V5VMDjClD3GiElqLWO7mz2MxNAK/vTfRHdAubSIPRgs=
 github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
 github.com/Azure/go-autorest/autorest v0.9.0 h1:MRvx8gncNaXJqOoLmhNjUAKh33JJF8LyxPhomEtOsjs=