Add info about new MSRV policy to crates we can imminently release (#2002)

See RustCrypto/meta#26

Author: tarcieri

base16ct/README.md

@@ -18,6 +18,13 @@ Supports `no_std` environments and avoids heap allocations in the core API
 
 [Documentation][docs-link]
 
+## Minimum Supported Rust Version (MSRV) Policy
+
+MSRV increases are not considered breaking changes and can happen in patch releases.
+
+The crate MSRV accounts for all supported targets and crate feature combinations, excluding
+explicitly unstable features.
+
 ## License
 
 Licensed under either of:

base32ct/README.md

@@ -18,6 +18,13 @@ Supports `no_std` environments and avoids heap allocations in the core API
 
 [Documentation][docs-link]
 
+## Minimum Supported Rust Version (MSRV) Policy
+
+MSRV increases are not considered breaking changes and can happen in patch releases.
+
+The crate MSRV accounts for all supported targets and crate feature combinations, excluding
+explicitly unstable features.
+
 ## License
 
 Licensed under either of:

base64ct/README.md

@@ -41,12 +41,12 @@ fixed-width line wrapping.
 - bcrypt Base64: `.`, `/`, `[A-Z]`, `[a-z]`, `[0-9]`
 - `crypt(3)` Base64: `.`, `-`, `[0-9]`, `[A-Z]`, `[a-z]`
 
-## Minimum Supported Rust Version
+## Minimum Supported Rust Version (MSRV) Policy
 
-This crate requires **Rust 1.85** at a minimum.
-   
-We may change the MSRV in the future, but it will be accompanied by a minor
-version bump.
+MSRV increases are not considered breaking changes and can happen in patch releases.
+
+The crate MSRV accounts for all supported targets and crate feature combinations, excluding
+explicitly unstable features.
 
 ## License
 

mcf/README.md

@@ -35,12 +35,12 @@ For more information and history on MCF, see the [PassLib documentation].
 $6$rounds=100000$exn6tVc2j/MZD8uG$BI1Xh8qQSK9J4m14uwy7abn.ctj/TIAzlaVCto0MQrOFIeTXsc1iwzH16XEWo/a7c7Y9eVJvufVzYAs4EsPOy0
 ```
 
-## Minimum Supported Rust Version
+## Minimum Supported Rust Version (MSRV) Policy
 
-This crate requires **Rust 1.85** at a minimum.
+MSRV increases are not considered breaking changes and can happen in patch releases.
 
-We may change the MSRV in the future, but it will be accompanied by a minor
-version bump.
+The crate MSRV accounts for all supported targets and crate feature combinations, excluding
+explicitly unstable features.
 
 ## License
 

serdect/README.md

@@ -38,6 +38,12 @@ help reduce the overall timing variability.
 - [`serde-json`](https://crates.io/crates/serde-json) v1
 - [`toml`](https://crates.io/crates/toml) v0.7
 
+## Minimum Supported Rust Version (MSRV) Policy
+
+MSRV increases are not considered breaking changes and can happen in patch releases.
+
+The crate MSRV accounts for all supported targets and crate feature combinations, excluding
+explicitly unstable features.
 
 ## License
 

tai64/README.md

@@ -11,6 +11,13 @@ format in Rust.
 
 [Documentation][docs-link]
 
+## Minimum Supported Rust Version (MSRV) Policy
+
+MSRV increases are not considered breaking changes and can happen in patch releases.
+
+The crate MSRV accounts for all supported targets and crate feature combinations, excluding
+explicitly unstable features.
+
 ## License
 
 Licensed under either of:
@@ -37,7 +44,7 @@ dual licensed as above, without any additional terms or conditions.
 [build-image]: https://github.com/RustCrypto/formats/actions/workflows/tai64.yml/badge.svg
 [build-link]: https://github.com/RustCrypto/formats/actions/workflows/tai64.yml
 
-[//]: # (general links)
+[//]: # (links)
 
 [RustCrypto]: https://github.com/RustCrypto/
 [TAI64(N)]: https://cr.yp.to/libtai/tai64.html