chore: Configure release process

Experimenting with treating clap-derive and clap one and the same from
the release process perspective.  The completion generators are a bit
more independent.

Cargo.toml

@@ -35,6 +35,17 @@ include = [
 [package.metadata.docs.rs]
 features = ["doc"]
 
+[package.metadata.release]
+shared-version = true
+pre-release-replacements = [
+  {file="CHANGELOG.md", search="Unreleased", replace="{{version}}", min=1},
+  {file="CHANGELOG.md", search="\\.\\.\\.HEAD", replace="...{{tag_name}}", exactly=1},
+  {file="CHANGELOG.md", search="ReleaseDate", replace="{{date}}", min=1},
+  {file="CHANGELOG.md", search="<!-- next-header -->", replace="<!-- next-header -->\n## [Unreleased] - ReleaseDate\n", exactly=1},
+  {file="CHANGELOG.md", search="<!-- next-url -->", replace="<!-- next-url -->\n[Unreleased]: https://github.com/clap-rs/clap/compare/{{tag_name}}...HEAD", exactly=1},
+  {file="README.md", search="github.com/clap-rs/clap/blob/[^/]+/", replace="github.com/clap-rs/clap/blob/{{tag_name}}/", exactly=9, prerelease = true},
+]
+
 [features]
 default = [
 	"std",

clap_derive/Cargo.toml

@@ -22,6 +22,10 @@ categories = ["command-line-interface", "development-tools::procedural-macro-hel
 license = "MIT OR Apache-2.0"
 readme = "README.md"
 
+[package.metadata.release]
+shared-version = true
+tag = false
+
 [lib]
 proc-macro = true
 bench = false

release.toml

@@ -0,0 +1,6 @@
+pre-release-commit-message = "chore: Release"
+tag-message = "{{tag_name}}"
+tag-name = "{{prefix}}v{{version}}"
+consolidate-commits = true
+consolidate-pushes = true
+allow-branch = ["master"]