Tag the 0.9.0 release

== What's Changed
* sign: init by @jleightcap in sigstore#310
* cargo audit: ignore RUSTSEC-2023-0071 by @jleightcap in sigstore#321
* chore(deps): Update json-syntax requirement from 0.9.6 to 0.10.0 by @dependabot in sigstore#319
* chore(deps): Update cached requirement from 0.46.0 to 0.47.0 by @dependabot in sigstore#323
* chore(deps): Update serial_test requirement from 2.0.0 to 3.0.0 by @dependabot in sigstore#322
* dep: update rustls-webpki, fold in pki_types by @jleightcap in sigstore#324
* chore(deps): Update cached requirement from 0.47.0 to 0.48.0 by @dependabot in sigstore#325
* chore(deps): Update json-syntax requirement from 0.10.0 to 0.11.1 by @dependabot in sigstore#327
* chore(deps): Update cached requirement from 0.48.0 to 0.49.2 by @dependabot in sigstore#329
* chore(deps): Update json-syntax requirement from 0.11.1 to 0.12.2 by @dependabot in sigstore#330
* lint: fix lint error of chrono and tokio by @Xynnn007 in sigstore#334
* chore(deps): Update base64 requirement from 0.21.0 to 0.22.0 by @dependabot in sigstore#332
* The `Repository` trait and `ManualRepository` struct no longer require a feature flag by @tannaurus in sigstore#331
* chore(deps): Bump actions/checkout from 4.1.1 to 4.1.2 by @dependabot in sigstore#336
* chore(deps): Update reqwest requirement from 0.11 to 0.12 by @dependabot in sigstore#341
* update tough dep by @astoycos in sigstore#340

== New Contributors
* @tannaurus made their first contribution in sigstore#331
* @astoycos made their first contribution in sigstore#340

**Full Changelog**: sigstore/sigstore-rs@v0.8.0...v0.9.0

Signed-off-by: Flavio Castelli <fcastelli@suse.com>

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "sigstore"
 description = "An experimental crate to interact with sigstore"
-version = "0.8.0"
+version = "0.9.0"
 edition = "2021"
 authors = ["sigstore-rs developers"]
 license = "Apache-2.0"