deps: bump github.com/sylabs/sif/v2 to v2.8.1 (#145)

Signed-off-by: Adam Hughes <[email protected]>

go.mod

@@ -26,7 +26,7 @@ require (
 	github.com/sirupsen/logrus v1.8.1
 	github.com/spf13/afero v1.6.0
 	github.com/stretchr/testify v1.7.0
-	github.com/sylabs/sif/v2 v2.7.2
+	github.com/sylabs/sif/v2 v2.8.1
 	github.com/sylabs/squashfs v0.6.1
 	github.com/wagoodman/go-partybus v0.0.0-20200526224238-eb215533f07d
 	github.com/wagoodman/go-progress v0.0.0-20200621122631-1a2120f0695a

go.sum

@@ -898,8 +898,8 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
-github.com/sylabs/sif/v2 v2.7.2 h1:eCxtl2ub9fPfrO7g2JPagn6HKDhv+Kl92Jz6+ww2Y1Q=
-github.com/sylabs/sif/v2 v2.7.2/go.mod h1:LQOdYXC9a8i7BleTKRw9lohi0rTbXkJOeS9u0ebvgyM=
+github.com/sylabs/sif/v2 v2.8.1 h1:whr4Vz12RXfLnYyVGHoD/rD/hbF2g9OW7BJHa+WIqW8=
+github.com/sylabs/sif/v2 v2.8.1/go.mod h1:LQOdYXC9a8i7BleTKRw9lohi0rTbXkJOeS9u0ebvgyM=
 github.com/sylabs/squashfs v0.6.1 h1:4hgvHnD9JGlYWwT0bPYNt9zaz23mAV3Js+VEgQoRGYQ=
 github.com/sylabs/squashfs v0.6.1/go.mod h1:ZwpbPCj0ocIvMy2br6KZmix6Gzh6fsGQcCnydMF+Kx8=
 github.com/syndtr/gocapability v0.0.0-20170704070218-db04d3cc01c8/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=