add changelog

Author: chrissimpkins

CHANGELOG.md

@@ -0,0 +1,31 @@
+# Changelog
+
+## v0.3.0
+
+- Transition to Rustlang edition 2018
+- Add test stage that can process output to decide outcome based on more subtle predicate than just `exit_status.success()`
+- Add support for optional `--regress=ice` regression testing definition (default is `--regress=error`)
+- Add support for optional `--regress=success` regression testing definition (default is `--regress=error`)
+- Add support for optional `--regress=non-error` regression testing definition (default is `--regress=error`)
+- Update the `remove` function to use an explicit `bisector` string at the beginning of the path name
+- Update the `remove` function to guard against deleting state not managed by `cargo-bisect-rustc`
+- Edit short and long help strings to fit on a single line
+- Fix: support reuse of an already installed nightly, previously we would unconditionally fail the run
+
+## v0.2.1
+
+- Fix: refactor date bounds to assume that start date equals end date at the beginning of testing with `--end` option only
+
+## v0.2.0
+
+- Add automated regression report generation at the end of the test runs
+- Add validation of date bounds
+- Updated dependencies to avoid yanked dependency versions
+- Improve documentation: Add documentation on how to list bors' commits for bisections to a PR
+- Improve documentation: Update tutorial
+
+
+
+## v0.1.0
+
+- initial release