hashbrown: support 0.9 or 0.11

.github/workflows/ci.yml

@@ -90,6 +90,10 @@ jobs:
         run: |
           echo "::set-output name=all_additive_features::macros num-bigint num-complex hashbrown serde multiple-pymethods"
 
+      - if: matrix.msrv == 'MSRV'
+        name: Prepare minimal package versions (MSRV only)
+        run: cargo update -p hashbrown --precise 0.9.10
+
       - name: Build docs
         run: cargo doc --no-default-features --features "${{ steps.settings.outputs.all_additive_features }}"
 

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Packaging
 - Update `num-bigint` optional dependency to 0.4. [#1481](https://github.com/PyO3/pyo3/pull/1481)
 - Update `num-complex` optional dependency to 0.4. [#1482](https://github.com/PyO3/pyo3/pull/1482)
+- Extend `hashbrown` optional dependency supported versions to include 0.11. [#1496](https://github.com/PyO3/pyo3/pull/1496)
 
 ### Added
 - Add conversions between `OsStr`/`OsString`/`Path`/`PathBuf` and Python strings. [#1379](https://github.com/PyO3/pyo3/pull/1379)

Cargo.toml

@@ -27,7 +27,7 @@ num-complex = { version = "0.4", optional = true }
 paste = { version = "0.1.18", optional = true }
 pyo3-macros = { path = "pyo3-macros", version = "=0.13.2", optional = true }
 unindent = { version = "0.1.4", optional = true }
-hashbrown = { version = "0.11", optional = true }
+hashbrown = { version = ">= 0.9, < 0.12", optional = true }
 serde = {version = "1.0", optional = true}
 
 [dev-dependencies]