Declare MSRV of 1.63

That's what's in Debian bookworm.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/Cargo.toml b/Cargo.toml
index 7b96589594d8c02a7af82b31e79965dca1948a2d..8f9c6682fb0a4bd3b71bc21c6c1d4e0af5771108 100644 (file)
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ license="GPL-3.0-or-later"
 # ^ Actually, it's WITH LicenseRef-Hippotat-OpenSSL-Exception
 repository="https://salsa.debian.org/iwj/hippotat"
 homepage="https://www.chiark.greenend.org.uk/~ianmdlvl/hippotat/current/docs/"
+rust-version = "1.63"
 
 [workspace]
 members = ["macros"]