* fix(core): offending RFC4287
should not leave `<updated>` blank when `<published>` is not blank
these two fields MUST conform to the "date-time" production in RFC3339
Signed-off-by: Rongrong <15956627+Rongronggg9@users.noreply.github.com>
* test(common-utils): complete tests
Signed-off-by: Rongrong <15956627+Rongronggg9@users.noreply.github.com>
* test(template): restrict expected value of `pubDate`
Signed-off-by: Rongrong <15956627+Rongronggg9@users.noreply.github.com>