Merge #22

22: Document and test MSRV 1.31.0 r=almindor a=ra-kete

Part of [wg/#445](rust-embedded/wg#445).

Co-authored-by: Jan Teske <[email protected]>

Author: bors[bot]

.travis.yml

@@ -6,6 +6,8 @@ matrix:
   include:
     - rust: stable
     - rust: nightly
+    # MSRV
+    - rust: 1.31.0
 
 branches:
   only:

README.md

@@ -24,6 +24,11 @@ teams][teams].
 
 ## [Documentation](https://docs.rs/r0)
 
+## Minimum Supported Rust Version (MSRV)
+
+This crate is guaranteed to compile on stable Rust 1.31.0 and up. It *might*
+compile with older versions but that may change in any new patch release.
+
 ## License
 
 Licensed under either of