deps: Update SDK to fix --generate-update-payload and stack list (#418)

Updates SDK dependency to the latest commit (fa5926f) to include
a fix for the ecctl deployment show <ID> --generate update-payload
command, where there would be a panic if a size object was empty.

Additionally, this also includes a fix where the ecctl stack list command
was not ordering versions correctly.

Author: karencfv

go.mod

@@ -4,7 +4,7 @@ go 1.13
 
 require (
 	github.com/asaskevich/govalidator v0.0.0-20200907205600-7a23bdc65eef
-	github.com/elastic/cloud-sdk-go v1.1.1-0.20201207014834-7444fc44d078
+	github.com/elastic/cloud-sdk-go v1.1.1-0.20201210054209-fa5926f4b659
 	github.com/go-openapi/runtime v0.19.24
 	github.com/go-openapi/strfmt v0.19.11
 	github.com/pkg/errors v0.9.1

go.sum

@@ -60,6 +60,8 @@ github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZm
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
 github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
+github.com/elastic/cloud-sdk-go v1.1.1-0.20201210054209-fa5926f4b659 h1:JRcd5tMaiTsbnE+w6Y9LoFHxY3rDj6CDMqq0hH1nN9M=
+github.com/elastic/cloud-sdk-go v1.1.1-0.20201210054209-fa5926f4b659/go.mod h1:GwYiS8MNeHZ9qvy4+R5FAHvDvbL5OVyPXGOlYJ8BNKE=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=