standardize changelog format

see https://keepachangelog.com/en/1.0.0/

Author: Almenon

CHANGELOG.md

@@ -1,20 +1,26 @@
-## 1.0.8
-* @joaoe fixed a bug with pythonshell not working with unset std streams
-* https://github.com/extrabacon/python-shell/milestone/9
+## [1.0.8]
+### Fixed
+- @joaoe fixed a bug with pythonshell not working with unset std streams
+- https://github.com/extrabacon/python-shell/milestone/9
 
-## 1.0.7
-* default python path updated to py on windows
+## [1.0.7]
+### Changed
+- default python path updated to py on windows
 
-## 1.0.4
-* added getVersionSync
+## [1.0.4]
+### Added
+- added getVersionSync
 
-## 0.0.3
-* fixed buffering in `PythonShell.receive`, fixing [#1](https://github.com/extrabacon/python-shell/issues/1)
+## [0.0.3]
+### Fixed
+- fixed buffering in `PythonShell.receive`, fixing [#1](https://github.com/extrabacon/python-shell/issues/1)
 
-## 0.0.2
-* improved documentation
+## [0.0.2]
+### Changed
+- improved documentation
 
-## 0.0.1
-* initial version
-* independent module moved from [extrabacon/pyspreadsheet](https://github.com/extrabacon/pyspreadsheet)
+## [0.0.1]
+### Added
+- initial version
+- independent module moved from [extrabacon/pyspreadsheet](https://github.com/extrabacon/pyspreadsheet)