[nongnu] elpa/package-lint updated (5f2ae2d774 -> dd81a5b922)

[ELPA Syncer]

elpasync pushed a change to branch elpa/package-lint.

      from  5f2ae2d774 Fix build badge URL (broken recently by GitHub).v2.FINAL
       new  8eb052b449 Also handle aliases provided by compat, like string-split
       new  dd81a5b922 Release 0.21


Summary of changes:
 package-lint-test.el | 9 ++++++---
 package-lint.el      | 6 +++---
 2 files changed, 9 insertions(+), 6 deletions(-)