chore(deps): update MSRV to 1.72 (#1194)

* update msrv to 1.72

* changelog entry

* nit on older changelog

.changelog/unreleased/breaking-changes/1193-bump-msrv.md

@@ -0,0 +1,2 @@
+- [ibc] Update minimum supported Rust version to 1.72.
+  ([\#1193](https://github.com/cosmos/ibc-rs/issues/1193))

.changelog/unreleased/improvements/1171-update-ibc-proto-and-tendermint-deps.md

@@ -1,2 +1,2 @@
 - Update `ibc-proto` to v0.43.0 and `tendermint` dependencies to v0.35.0.
-  ([#1171](https://github.com/cosmos/ibc-rs/issues/1171))
+  ([\#1171](https://github.com/cosmos/ibc-rs/issues/1171))

.github/workflows/rust.yml

@@ -165,7 +165,7 @@ jobs:
     timeout-minutes: 30
     env:
       CARGO_MSRV_VERSION: 0.16.0-beta.20
-      MSRV: 1.71.1
+      MSRV: 1.72
     strategy:
       matrix:
         param:

Cargo.toml

@@ -45,7 +45,7 @@ exclude = [
 version      = "0.51.0"
 license      = "Apache-2.0"
 edition      = "2021"
-rust-version = "1.71.1"
+rust-version = "1.72"
 readme       = "README.md"
 repository   = "https://github.com/cosmos/ibc-rs"
 authors      = ["Informal Systems <hello@informal.systems>"]

clippy.toml

@@ -7,4 +7,4 @@ disallowed-types = [
 disallowed-methods = [
     "std::time::Duration::as_secs_f64",
 ]
-msrv = "1.71.1"
+msrv = "1.72"