reports: add published date

Change-Id: Ifb5126cfe601f7d2df9df92dbfc3b1a21e4f01bd
Reviewed-on: https://go-review.googlesource.com/c/vulndb/+/384835
Trust: Jonathan Amsterdam <jba@google.com>
Run-TryBot: Jonathan Amsterdam <jba@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Julie Qiu <julie@golang.org>
diff --git a/reports/GO-2020-0012.yaml b/reports/GO-2020-0012.yaml
index 1753588..47b69eb 100644
--- a/reports/GO-2020-0012.yaml
+++ b/reports/GO-2020-0012.yaml
@@ -7,6 +7,7 @@
     key, such that the library will panic when trying to verify a signature
     with it. If verifying signatures using user supplied public keys, this
     may be used as a denial of service vector.
+published: 2021-04-14T20:04:52Z
 cves:
   - CVE-2020-9283
 credit: Alex Gaynor, Fish in a Barrel