Release `cargo-contract` v0.15.0 and `contract-metadata` v0.4.0 (#351)

* Update changelog

* Bump version for `cargo-contract`

* Bump version for `contract-metadata`

* Bump version for `contract-metadata`

* Update changelog

* Update changelog

CHANGELOG.md

@@ -6,9 +6,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.15.0] - 2021-10-18
+
 ### Changed
-- Update `cargo contract new` template dependencies to ink! `rc4` - [#332](https://github.com/paritytech/cargo-contract/pull/332)
-- Update `cargo contract new` template dependencies to ink! `rc5` - [#335](https://github.com/paritytech/cargo-contract/pull/335)
+- Update to `scale-info` 1.0 and support new metadata versioning - [#342](https://github.com/paritytech/cargo-contract/pull/342)
+- Update `cargo contract new` template dependencies to ink! `rc6` - [#342](https://github.com/paritytech/cargo-contract/pull/342)
 
 ## [0.14.0] - 2021-08-12
 

Cargo.lock

@@ -487,7 +487,7 @@ dependencies = [
 
 [[package]]
 name = "cargo-contract"
-version = "0.14.0"
+version = "0.15.0"
 dependencies = [
  "anyhow",
  "assert_matches",
@@ -638,7 +638,7 @@ checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
 [[package]]
 name = "contract-metadata"
-version = "0.3.0"
+version = "0.4.0"
 dependencies = [
  "pretty_assertions",
  "semver",

Cargo.toml

@@ -3,7 +3,7 @@ members = [".", "metadata"]
 
 [package]
 name = "cargo-contract"
-version = "0.14.0"
+version = "0.15.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 build = "build.rs"
 edition = "2018"
@@ -33,7 +33,7 @@ colored = "2.0.0"
 toml = "0.5.8"
 rustc_version = "0.4.0"
 blake2 = "0.9.2"
-contract-metadata = { version = "0.3.0", path = "./metadata" }
+contract-metadata = { version = "0.4.0", path = "./metadata" }
 semver = { version = "1.0.4", features = ["serde"] }
 serde = { version = "1.0.130", default-features = false, features = ["derive"] }
 serde_json = "1.0.68"

metadata/Cargo.toml

 [package]
 name = "contract-metadata"
-version = "0.3.0"
+version = "0.4.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2018"