update MSRV to Rust 1.70, new MSRV policy

Maintaining compat with older Rust versions is such a hassle.

Author: sunshowers

.github/workflows/ci.yml

@@ -25,9 +25,9 @@ jobs:
       - name: Lint (rustfmt)
         run: cargo xfmt --check
       - name: Install cargo readme
-        uses: baptiste0928/cargo-install@2cfb0024938d23011106cbf127b393bc83fddba1 # v1
+        uses: taiki-e/install-action@672949f0e99e12c1a48510fa548e812f6835397f # v2
         with:
-          crate: cargo-readme
+          tool: cargo-readme
       - name: Run cargo readme
         run: ./scripts/regenerate-readmes.sh
       - name: Check for differences
@@ -38,9 +38,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-latest ]
-        # 1.56 is the MSRV
-        rust-version: [ 1.56, stable ]
+        os: [ubuntu-latest]
+        # 1.70 is the MSRV
+        rust-version: ["1.70", stable]
       fail-fast: false
     env:
       RUSTFLAGS: -D warnings

Cargo.toml

@@ -8,7 +8,7 @@ readme = "README.md"
 repository = "https://github.com/nextest-rs/future-queue"
 documentation = "https://docs.rs/future-queue"
 resolver = "2"
-rust-version = "1.56"
+rust-version = "1.70"
 categories = ["asynchronous"]
 keywords = ["stream", "futures", "async", "buffer_unordered"]
 

README.md

@@ -14,8 +14,8 @@
 * with global limits
 * and with an optional group specified for each future, with its own limits.
 
-This crate is part of the [nextest organization](https://github.com/nextest-rs) on GitHub, and is
-designed to serve the needs of [cargo-nextest](https://nexte.st).
+This crate is part of the [nextest organization](https://github.com/nextest-rs) on GitHub, and
+is designed to serve the needs of [cargo-nextest](https://nexte.st).
 
 ## Motivation
 
@@ -25,8 +25,8 @@ this adaptor takes a stream of futures[^1], and executes all the futures limited
 amount of concurrency.
 
 * Futures are started in the order the stream returns them in.
-* Once started, futures are polled simultaneously, and completed future outputs are returned
-  in arbitrary order (hence the `unordered`).
+* Once started, futures are polled simultaneously, and completed future outputs are returned in
+  arbitrary order (hence the `unordered`).
 
 Common use cases for `buffer_unordered` include:
 
@@ -99,10 +99,10 @@ except it is possible to specify an optional *group* for each future. Each group
 weight, and a future will only be scheduled if both the maximum weight and the group weight
 aren't exceeded.
 
-The adaptor is as fair as possible under the given constraints: it will schedule futures in
-the order they're returned by the stream, without doing any reordering based on weight. When
-a future from a group completes, queued up futures in this group will be preferentially
-scheduled before any other futures from the provided stream.
+The adaptor is as fair as possible under the given constraints: it will schedule futures in the
+order they're returned by the stream, without doing any reordering based on weight. When a
+future from a group completes, queued up futures in this group will be preferentially scheduled
+before any other futures from the provided stream.
 
 Like with [`future_queue`](StreamExt::future_queue):
 
@@ -140,11 +140,11 @@ assert_eq!(queue.next().await, None);
 
 ## Minimum supported Rust version (MSRV)
 
-The minimum supported Rust version is **Rust 1.56.**
+The minimum supported Rust version is **Rust 1.70.** At any time, at least the last six months
+of Rust stable releases are supported.
 
-The MSRV will likely not change in the medium term, but while this crate is a pre-release
-(0.x.x) it may have its MSRV bumped in a patch release. Once this crate has reached 1.x, any
-MSRV bump will be accompanied with a new minor version.
+While this crate is a pre-release (0.x.x) it may have its MSRV bumped in a patch release. Once
+this crate has reached 1.x, any MSRV bump will be accompanied with a new minor version.
 
 ## Notes
 

src/lib.rs

@@ -10,8 +10,8 @@
 //! * with global limits
 //! * and with an optional group specified for each future, with its own limits.
 //!
-//! This crate is part of the [nextest organization](https://github.com/nextest-rs) on GitHub, and is
-//! designed to serve the needs of [cargo-nextest](https://nexte.st).
+//! This crate is part of the [nextest organization](https://github.com/nextest-rs) on GitHub, and
+//! is designed to serve the needs of [cargo-nextest](https://nexte.st).
 //!
 //! # Motivation
 //!
@@ -21,8 +21,8 @@
 //! amount of concurrency.
 //!
 //! * Futures are started in the order the stream returns them in.
-//! * Once started, futures are polled simultaneously, and completed future outputs are returned
-//!   in arbitrary order (hence the `unordered`).
+//! * Once started, futures are polled simultaneously, and completed future outputs are returned in
+//!   arbitrary order (hence the `unordered`).
 //!
 //! Common use cases for `buffer_unordered` include:
 //!
@@ -97,10 +97,10 @@
 //! weight, and a future will only be scheduled if both the maximum weight and the group weight
 //! aren't exceeded.
 //!
-//! The adaptor is as fair as possible under the given constraints: it will schedule futures in
-//! the order they're returned by the stream, without doing any reordering based on weight. When
-//! a future from a group completes, queued up futures in this group will be preferentially
-//! scheduled before any other futures from the provided stream.
+//! The adaptor is as fair as possible under the given constraints: it will schedule futures in the
+//! order they're returned by the stream, without doing any reordering based on weight. When a
+//! future from a group completes, queued up futures in this group will be preferentially scheduled
+//! before any other futures from the provided stream.
 //!
 //! Like with [`future_queue`](StreamExt::future_queue):
 //!
@@ -140,11 +140,11 @@
 //!
 //! # Minimum supported Rust version (MSRV)
 //!
-//! The minimum supported Rust version is **Rust 1.56.**
+//! The minimum supported Rust version is **Rust 1.70.** At any time, at least the last six months
+//! of Rust stable releases are supported.
 //!
-//! The MSRV will likely not change in the medium term, but while this crate is a pre-release
-//! (0.x.x) it may have its MSRV bumped in a patch release. Once this crate has reached 1.x, any
-//! MSRV bump will be accompanied with a new minor version.
+//! While this crate is a pre-release (0.x.x) it may have its MSRV bumped in a patch release. Once
+//! this crate has reached 1.x, any MSRV bump will be accompanied with a new minor version.
 //!
 //! # Notes
 //!