Changed: Oldest supported rustc version to 1.31 from 1.24.

 - Update oldest Travis CI version too.
 - Now using release.toml to update oldest supported rustc.
 - Now using release.toml to add new header to CHANGELOG.md.

.travis.yml

@@ -4,7 +4,7 @@ rust:
   - stable
   - beta
   - nightly
-  - 1.24.0
+  - 1.31.0
 
 matrix:
   allow_failures:

CHANGELOG.md

@@ -8,6 +8,13 @@ The format is based on [Keep a Changelog] and this project adheres to
 [Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
 [Semantic Versioning]: http://semver.org/spec/v2.0.0.html
 
+<!-- next-header -->
+
+## [Unreleased]
+
+### Changed
+- Oldest supported rustc version is now 1.31.0.
+
 ## [0.11.0] - 2019-01-16
 
 ### Fixed

release.toml

@@ -1,6 +1,9 @@
 upload-doc = true
 pre-release-replacements = [
-  { file="README.md", search="bv = \"[0-9.]*\"", replace="bv = \"{{version}}\"" },
-  { file="src/lib.rs", search="bv = \"[0-9.]*\"", replace="bv = \"{{version}}\"" },
-  { file="CHANGELOG.md", search="\\[Unreleased\\]", replace="[{{version}}] - {{date}}" }
+  {file="README.md",  search="Rust version [0-9.]* and newer", replace="Rust version 1.31 and newer"},
+  {file="src/lib.rs", search="Rust version [0-9.]* and newer", replace="Rust version 1.31 and newer"},
+  {file="README.md",  search="bv = \"[0-9.]*\"", replace="bv = \"{{version}}\""},
+  {file="src/lib.rs", search="bv = \"[0-9.]*\"", replace="bv = \"{{version}}\""},
+  {file="CHANGELOG.md", search="\\[Unreleased\\]", replace="[{{version}}] - {{date}}"},
+  {file="CHANGELOG.md", search="<!-- next-header -->", replace="<!-- next-header -->\n\n## [Unreleased]"},
 ]

src/lib.rs

@@ -86,7 +86,7 @@
 //!
 //! to your crate root.
 //!
-//! This crate supports Rust version 1.24 and newer.
+//! This crate supports Rust version 1.31 and newer.
 //!
 //! [`BitVec`]: struct.BitVec.html
 //! [`Bits`]: trait.Bits.html