Bump MSRV to 1.65.0

Newer versions of test dependencies need it, and it's sufficiently
old that I doubt it will affect anyone.

(If you're reading this because it did affect you, please yell out!
We could definitely support older Rust compilers if it actually
matters to someone.)

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         toolchain:
           # Don't forget to update the README when bumping MSRV.
-          - 1.61.0
+          - 1.65.0
           - stable
           - beta
           - nightly

CHANGELOG.md

@@ -1,3 +1,9 @@
+### v1.5.0 (unreleased)
+
+- **Changes**:
+    - Bump minimum supported Rust version to 1.65.0 (released 2022-11-03). This is for compatibility with new versions of some of rangemap's test dependencies.
+    - TODO: All of xfbs's PRs!
+
 ### v1.4.0 (2023-09-19)
 
 - **Changes**:

Cargo.toml

@@ -14,7 +14,7 @@ Map and set data structures whose keys are stored as ranges.
 Contiguous and overlapping ranges that map to the same value are coalesced into a single range.
 """
 categories = ["data-structures"]
-rust-version = "1.61.0"
+rust-version = "1.65.0"
 
 [dependencies]
 serde = { version = "1", optional = true }
@@ -27,7 +27,7 @@ permutator = "0.4"
 # (Later problem!)
 criterion = "= 0.3.5"
 rand = "0.8"
-chrono = "0.4" # For examples
+chrono = "0.4"          # For examples
 rustc_version = "0.4"
 serde_json = "1"
 proptest = "1.4.0"

README.md

@@ -3,7 +3,7 @@
 [![Crate](https://img.shields.io/crates/v/rangemap.svg)](https://crates.io/crates/rangemap)
 [![Docs](https://docs.rs/rangemap/badge.svg)](https://docs.rs/rangemap)
 [![Build status](https://github.com/jeffparsons/rangemap/workflows/CI/badge.svg)](https://github.com/jeffparsons/rangemap/actions)
-[![Rust](https://img.shields.io/badge/rust-1.61.0%2B-blue.svg?maxAge=3600)](https://github.com/jeffparsons/rangemap) <!-- Don't forget to update the GitHub actions config when bumping minimum Rust version. -->
+[![Rust](https://img.shields.io/badge/rust-1.65.0%2B-blue.svg?maxAge=3600)](https://github.com/jeffparsons/rangemap) <!-- Don't forget to update the GitHub actions config when bumping minimum Rust version. -->
 
 [`RangeMap`] and [`RangeInclusiveMap`] are map data structures whose keys
 are stored as ranges. Contiguous and overlapping ranges that map to the same