Don't use author date as email date

This can be months in the past, and means people who sort their
messages by date won't see commits.  Ideally, we'd set this to the
time of the push, but since that information isn't exposed, the best
we can do is the time when we saw it.

Author and committer dates are now both included in the message
header.

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 71b2e02..21b3539 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -507,6 +507,7 @@ dependencies = [
 name = "pushmail"
 version = "0.1.0"
 dependencies = [
+ "chrono",
  "clap",
  "failure",
  "graphql_client",