Pact Foundation

<https://github.com/pact-foundation/pact-reference/releases/tag/libpact_models-v1.2.3|Release - Pact Models Library v1.2.3>
New release published by <https://github.com/rholshausen|rholshausen>
*Support for provider state injected values in plugins*

• <https://github.com/pact-foundation/pact-reference/commit/033a50ab2cba937ab69567b68a42fdf17703f556|033a50a> - feat: Update the matching rule expression parser to support values from provider states
• <https://github.com/pact-foundation/pact-reference/commit/2ca9a9ae1330a5811c7165e404a5723984cdc0ee|2ca9a9a> - chore(pact_models): Improve the matching rule expression parser error messages
• <https://github.com/pact-foundation/pact-reference/commit/77814aef9498d029616ac9bbd2f42dce54fe7902|77814ae> - fix(pact_models): fix: when writing pact specs in V2 format, header matchers must be pluralised <https://github.com/pact-foundation/pact-reference/issues/449|#449>
• <https://github.com/pact-foundation/pact-reference/commit/3c96c31b07a1fb24f809017bef0ac55f6654fdd1|3c96c31> - chore: Upgrade pact_mock_server to 1.2.9
<https://github.com/pact-foundation/pact-reference|pact-foundation/pact-reference>