Prepare 1.5.0-rc1 (#317)

* migrate to sfio-rustls-config 0.1.2

* update changelog for 1.5.0-rc1

* update dependency allowlist

* add mach2 to allow-list

* bump version to 1.5.0-rc1

CHANGELOG.md

@@ -1,3 +1,11 @@
+### 1.5.0-rc1 ###
+* :star: Add configuration option that allows outstation to respond to any master. See [#316](https://github.com/stepfunc/dnp3/pull/316).
+* :star: Add optional [serde](https://crates.io/crates/serde) support for public config types in Rust. See [#303](https://github.com/stepfunc/dnp3/pull/303).
+* :wrench: Fix cmake download when building C/C++ examples. See [#307](https://github.com/stepfunc/dnp3/pull/307).
+* :book: Fix FFI docs for g12v1 and remove g12v0 and g41v0. See [#308](https://github.com/stepfunc/dnp3/pull/308)
+* :bug: Fix master task scheduling CPU thrashing under certain conditions. See [#312](https://github.com/stepfunc/dnp3/pull/312).
+* :bug: Fix bug where `AssociationInformation::task_fail` was not properly being called for some tasks. See [#313](https://github.com/stepfunc/dnp3/pull/313).
+
 ### 1.4.1 ###
 * :bug: Bump rustls to 0.21.1 to resolve [#300](https://github.com/stepfunc/dnp3/issues/300).