Add changelog

Author: pcisar

CHANGELOG.md

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+# Change Log
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [Unreleased] - yyyy-mm-dd
+
+### Changed
+
+- Build system changed from setuptools to hatch
+
+## [1.4.0] - 2023-06-30
+
+### Added
+
+- Initial support for Firebird 5 (new items in `schema` and `monitor` modules).
+- Finally, Firebird 4 support was added (new items in `schema` and `monitor` modules).
+
+### Changed
+
+- Potentially breaking changes:
+
+  - Enum `firebird.lib.monitor.ShutdownMode` was removed and replaced with
+    `firebird.driver.types.ShutdownMode`. They are basically the same, but differ in value
+    name ONLINE->NORMAL.
+  - `firebird.lib.schema.ObjectType` value `PACKAGE` was renamed to `PACKAGE_HEADER`
+
+- Updated dependencies: firebird-driver>=1.9.0 and firebird-base>=1.6.1
+- Note: The list of reserved words (used internally to correctly quote identifiers) is
+  not hardcoded in Firebird 5, but is instead read from `RDB$KEYWORDS` table.
+
+## [1.3.0] - 2023-03-03
+
+### Changed
+
+- Move away from `setup.cfg` to `pyproject.toml`, changed source three layout.
+
+## [1.2.2] - 2022-10-14
+
+### Changed
+
+- Further code optimizations.
+- Addressing issues reported by pylint.
+- Improved documentation.
+
+## [1.2.1] - 2022-10-03
+
+### Fixed
+
+- schema: Fixed problems with system PSQL functions and system packages.
+- Tests now properly work on Firebird 4.0
+
+### Added
+
+- Documentation is now also provided as Dash / Zeal docset, downloadable from releases at github.
+
+### Changed
+
+- Code optionizations.
+
+## [1.2.0] - 2021-10-13
+
+### Fixed
+
+- schema: Fix index type in `Constraint` and `Table` CREATE SQL.
+- trace: Fixed several unregistered bugs in parser.
+
+### Added
+
+- schema: `insert` SQL for `Table`.
+- trace: `TransactionInfo.initial_id`.
+- trace: Items `EventCommitRetaining.new_transaction_id` and `EventRollbackRetaining.new_transaction_id`.
+- trace: Events `EventFunctionStart` and `EventFunctionFinish`.
+- trace: Item `EventSweepFinish.access`.
+
+### Changed
+
+- schema: `Sequence` ALTER SQL uses RESTART instead START keyword.
+- trace: `EventServiceQuery.parameters` was replaced by `EventServiceQuery.sent` and
+         `EventServiceQuery.received`.
+
+### Removed
+
+- trace: `EventFreeStatement.transaction_id` and `EventCloseCursor.transaction_id` were removed.
+
+## [1.0.1] - 2021-03-04
+
+### Added
+
+- trace: New `has_statement_free` parsing option indicating that parsed trace contains
+  `FREE_STATEMENT` events.
+
+### Changed
+
+- Build scheme changed to `PEP 517`.
+- Various changes to documentation and type hint adjustments.
+- trace: Adjustments to seen items cache management.
+
+
+## [1.0.0] - 2020-10-13
+
+Initial release.