Set our MSRV to 1.70.

.gitlab-ci.yml

@@ -164,7 +164,7 @@ clippy:
   before_script:
     - *before_script_start
     - apt-get -y install libssl-dev capnproto libsqlite3-dev
-    - rustup default 1.67.0
+    - rustup default 1.70.0
     - rustup component add clippy
     - cargo clippy --version
     - *before_script_end
@@ -189,7 +189,7 @@ windows-gnu-cng:
   before_script:
     # We don't call *before_script_start or *before_script_end as we
     # don't have bash, clang, etc.
-    - rustup default "1.67.0"
+    - rustup default "1.70.0"
     - rustc --version --verbose
     - cargo --version
   script:

Cargo.toml

@@ -22,7 +22,7 @@ keywords = ["cryptography", "openpgp", "pgp", "encryption", "signing"]
 categories = ["cryptography", "authentication", "command-line-utilities"]
 license = "LGPL-2.0-or-later"
 edition = "2021"
-rust-version = "1.63"
+rust-version = "1.70"
 
 [badges]
 gitlab = { repository = "sequoia-pgp/sequoia-sq" }