Dear maintainer,

I'm about to upgrade the prost family from 0.12 to 0.13.
An upgrade of tonic to 0.13 is also prepared for its maintainer's convenience.
I'll let you know when new versions of them are ready.

For your convenience, I've checked that simply
- dropping 0013-compile-against-prost-12.6.patch
- applying following patch

would work.
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -58 +58 @@
-tonic = "0.12.3"
+tonic = "0.13"
@@ -70 +70 @@
-tonic-build = "0.12.3"
+tonic-build = "0.13"

Awesome, thank you so much for checking and letting me know!