All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
* allow an input source-map to be passed to instrumentSync() ([#23](https://github.com/istanbuljs/istanbul-lib-instrument/issues/23)) ([b08e4f5](https://github.com/istanbuljs/istanbul-lib-instrument/commit/b08e4f5))
* implement function to extract empty coverage data from an instrumented file ([#28](https://github.com/istanbuljs/istanbul-lib-instrument/issues/28)) ([06d0ef6](https://github.com/istanbuljs/istanbul-lib-instrument/commit/06d0ef6))
* hoist coverage variable to very top of file ([#26](https://github.com/istanbuljs/istanbul-lib-instrument/issues/26)) ([0225e8c](https://github.com/istanbuljs/istanbul-lib-instrument/commit/0225e8c))
* use zero-based numeric indices for much faster instrumented code ([#22](https://github.com/istanbuljs/istanbul-lib-instrument/issues/22)) ([5b401f5](https://github.com/istanbuljs/istanbul-lib-instrument/commit/5b401f5))
* guard against invalid loc ([#16](https://github.com/istanbuljs/istanbul-lib-instrument/issues/16)) ([23ebfc3](https://github.com/istanbuljs/istanbul-lib-instrument/commit/23ebfc3))