Update changelog for v1.0.0

CHANGELOG.md

@@ -1,10 +1,34 @@
 # Changelog
+All notable changes to this project will be documented in this file.
 
-* Add GetProcessMemoryInfo: [#2](https://github.com/elastic/go-windows/pull/2)
-* Add APIs to fetch process information:
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+## [1.0.0] - 2019-04-26
+
+### Added
+
+- Add GetProcessMemoryInfo. #2
+- Add APIs to fetch process information #6.
   - NtQueryInformationProcess
   - ReadProcessMemory
   - GetProcessImageFileName
   - EnumProcesses
-  [#6](https://github.com/elastic/go-windows/pull/6)
-* Add GetProcessHandleCount to kernel32: [#7](https://github.com/elastic/go-windows/pull/7)
+- Add GetProcessHandleCount to kernel32. #7
+
+[Unreleased]: https://github.com/elastic/go-windows/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/elastic/go-windows/v1.0.0