Ensure Updated property can be omitted

Now, the web-core pkg uses a pointer instead of a var, so we don't send
a zero time.Time value out via ActivityPub.

activitypub.go

@@ -718,7 +718,7 @@ func federatePost(app *App, p *PublicPost, collID int64, isUpdate bool) error {
 		// create a new "Create" activity
 		// with our article as object
 		if isUpdate {
-			na.Updated = p.Updated
+			na.Updated = &p.Updated
 			activity = activitystreams.NewUpdateActivity(na)
 		} else {
 			activity = activitystreams.NewCreateActivity(na)

go.mod

@@ -31,7 +31,7 @@ require (
 	github.com/writeas/monday v1.3.0
 	github.com/writeas/saturday v1.7.2-0.20200427193424-392b95a03320
 	github.com/writeas/slug v1.2.0
-	github.com/writeas/web-core v1.6.1-0.20231002232751-adbbafe3ee0c
+	github.com/writeas/web-core v1.6.1-0.20231003013047-d81124d45431
 	github.com/writefreely/go-gopher v0.0.0-20220429181814-40127126f83b
 	github.com/writefreely/go-nodeinfo v1.2.0
 	golang.org/x/crypto v0.13.0

go.sum

@@ -143,8 +143,8 @@ github.com/writeas/saturday v1.7.2-0.20200427193424-392b95a03320 h1:PozPZ29CQ/xt
 github.com/writeas/saturday v1.7.2-0.20200427193424-392b95a03320/go.mod h1:ETE1EK6ogxptJpAgUbcJD0prAtX48bSloie80+tvnzQ=
 github.com/writeas/slug v1.2.0 h1:EMQ+cwLiOcA6EtFwUgyw3Ge18x9uflUnOnR6bp/J+/g=
 github.com/writeas/slug v1.2.0/go.mod h1:RE8shOqQP3YhsfsQe0L3RnuejfQ4Mk+JjY5YJQFubfQ=
-github.com/writeas/web-core v1.6.1-0.20231002232751-adbbafe3ee0c h1:OcubGLNP26NPbe7s8ppUi8pl1IPKMHZ7Wu+jjxDATBg=
-github.com/writeas/web-core v1.6.1-0.20231002232751-adbbafe3ee0c/go.mod h1:7+idL4Y4woF7MnUfNX2mvkaQ8nLIJXths2y5iYPtA3k=
+github.com/writeas/web-core v1.6.1-0.20231003013047-d81124d45431 h1:ruqL2u87k504PXkR/fC4DcfZyyHmCindlpjOQKmyOsY=
+github.com/writeas/web-core v1.6.1-0.20231003013047-d81124d45431/go.mod h1:7+idL4Y4woF7MnUfNX2mvkaQ8nLIJXths2y5iYPtA3k=
 github.com/writefreely/go-gopher v0.0.0-20220429181814-40127126f83b h1:h3NzB8OZ50NNi5k9yrFeyFszt3LyqyVK4+xUHFYY8B0=
 github.com/writefreely/go-gopher v0.0.0-20220429181814-40127126f83b/go.mod h1:T2UVVzt+R5KSSZe2xRSytnwc2M9AoDegi7foeIsik+M=
 github.com/writefreely/go-nodeinfo v1.2.0 h1:La+YbTCvmpTwFhBSlebWDDL81N88Qf/SCAvRLR7F8ss=