Added CHANGELOG

CHANGELOG.md

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+# Changelog
+
+## Version 0.6.0 (2024-03-??)
+
+- Added a CHANGELOG file.
+- Switched yaml input to use the ruamel.yaml round trip parser.
+  This parser is also "safe", i.e. does not allow code execution. 
+- Added line numbers and columns to error messages where possible.
+  For yaml files, these are taken from the ruamel.yaml round trip parser.
+  For tsv files, the column names within the specified block are reported.
+- Added `--strict` flag to the `convert` sub-command that prevents converting files that produced warnings.
+- The rules `keys_valid` and `keys_unique` now correctly report their name in output.
+- Added integration tests checking tsv files.
+
+
+## Version 0.5.0 (2024-01-10)
+
+- Improved documentation and user feedback
+- Added option to check multiple files. You can now specify multiple input file paths for the check sub-command and those file paths can be glob patterns.
+- Added suggestions for fixes to some lints.
+
+Please note that the convert sub-command currently only works with one input file.
+
+
+## Version 0.4.0 (2023-12-21)
+
+- Added option to skip lints or reduce their severity to warning.
+- Added first suggestions for fixes, e.g. minor typo detection with string matching.
+- Added RULES.md to have a human readable documentation of employed lints.
+
+
+## Version 0.3.0 (2023-12-05)
+
+This release adds:
+
+- Lints to detect trailing spaces
+- Internal preparations to support multiple files
+- Minor documentation improvements