core: prepare to release v0.1.18

# 0.1.18 (April 30, 2010)

### Added

- `Subscriber` impl for `Box<dyn Subscriber + Send + Sync + 'static>`
  ([tokio-rs#1358])
- `Subscriber` impl for `Arc<dyn Subscriber + Send + Sync + 'static>`
  ([tokio-rs#1374])
- Symmetric `From` impls for existing `Into` impls on `Current` and
  `Option<Id>` ([tokio-rs#1335])
- `Attributes::fields` accessor that returns the set of fields defined
  on a span's `Attributes` ([tokio-rs#1331])

Thanks to @Folyd for contributing to this release!

[tokio-rs#1358]: tokio-rs#1358
[tokio-rs#1374]: tokio-rs#1374
[tokio-rs#1335]: tokio-rs#1335
[tokio-rs#1331]: tokio-rs#1331

tracing-core/CHANGELOG.md

@@ -1,3 +1,22 @@
+# 0.1.18 (April 30, 2010)
+
+### Added
+
+- `Subscriber` impl for `Box<dyn Subscriber + Send + Sync + 'static>` ([#1358])
+- `Subscriber` impl for `Arc<dyn Subscriber + Send + Sync + 'static>` ([#1374])
+- Symmetric `From` impls for existing `Into` impls on `Current` and `Option<Id>`
+  ([#1335])
+- `Attributes::fields` accessor that returns the set of fields defined on a
+  span's `Attributes` ([#1331])
+
+
+Thanks to @Folyd for contributing to this release!
+
+[#1358]: https://github.com/tokio-rs/tracing/pull/1358
+[#1374]: https://github.com/tokio-rs/tracing/pull/1374
+[#1335]: https://github.com/tokio-rs/tracing/pull/1335
+[#1331]: https://github.com/tokio-rs/tracing/pull/1331
+
 # 0.1.17 (September 28, 2020)
 
 ### Fixed

tracing-core/README.md

@@ -16,9 +16,9 @@ Core primitives for application-level tracing.
 [Documentation][docs-url] | [Chat][discord-url]
 
 [crates-badge]: https://img.shields.io/crates/v/tracing-core.svg
-[crates-url]: https://crates.io/crates/tracing-core/0.1.17
+[crates-url]: https://crates.io/crates/tracing-core/0.1.18
 [docs-badge]: https://docs.rs/tracing-core/badge.svg
-[docs-url]: https://docs.rs/tracing-core/0.1.17
+[docs-url]: https://docs.rs/tracing-core/0.1.18
 [docs-master-badge]: https://img.shields.io/badge/docs-master-blue
 [docs-master-url]: https://tracing-rs.netlify.com/tracing_core
 [mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg
@@ -79,7 +79,7 @@ The following crate feature flags are available:
 
   ```toml
   [dependencies]
-  tracing-core = { version = "0.1.17", default-features = false }
+  tracing-core = { version = "0.1.18", default-features = false }
   ```
 
   **Note**:`tracing-core`'s `no_std` support requires `liballoc`.