Auto merge of #1673 - jtgeibel:bump-lettre, r=sgrif

Bump to the new `lettre` and `lettre_email` releases

Author: bors

Cargo.lock

@@ -63,8 +63,8 @@ parking_lot = "0.7.1"
 jemallocator = { version = "0.1.8", features = ['unprefixed_malloc_on_supported_platforms', 'profiling'] }
 jemalloc-ctl = "0.2.0"
 
-lettre = {git = "https://github.com/lettre/lettre", version = "0.9"}
-lettre_email = {git = "https://github.com/lettre/lettre", version = "0.9"}
+lettre = "0.9"
+lettre_email = "0.9"
 
 conduit = "0.8"
 conduit-conditional-get = "0.8"