build(zone.js): update changelog of zone.js (#31915)

PR Close #31915
2019-07-30 15:21:52 -06:00
parent ebb27727e4
commit fa4e17082c
3 changed files with 21 additions and 10 deletions
--- a/packages/zone.js/DEVELOPER.md
+++ b/packages/zone.js/DEVELOPER.md
@ -90,6 +90,7 @@ $ git tag $TAG
 - create a PR to update `changelog` of zone.js

 ```
+$ export PREVIOUS_ZONE_TAG=<PREVIOUS ZONE RELEASE TAG>
 $ yarn gulp changelog:zonejs
 ```