<commit_before># Changelog

> **Tags:**
> - [New Feature]
> - [Bug Fix]
> - [Spec Compliancy]
> - [Breaking Change]
> - [Documentation]
> - [Internal]
> - [Polish]

_Note: Gaps between patch versions are faulty/broken releases._

See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.

## 5.1.5

 * **Internal**
  * Bump `core-js` version.

## 5.1.4

 * **Polish**
  * Add missing `Reflect` methods to runtime transformer.

## 5.1.3

 * **Internal**
  * Switch entirely to vanilla regenerator.
  * Clean up and make the parsing of decorators stateless.
 * **Bug Fix**
  * Don't do TCO on generators and async functions.
  * Add missing `core-js` runtime definitions.

## 5.1.2
<commit_msg>add 5.1.6-5.1.7 changelog<commit_after># Changelog

> **Tags:**
> - [New Feature]
> - [Bug Fix]
> - [Spec Compliancy]
> - [Breaking Change]
> - [Documentation]
> - [Internal]
> - [Polish]

_Note: Gaps between patch versions are faulty/broken releases._

See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.

## 5.1.7

 * **Internal**
  * Add `parse` node API.

## 5.1.6

 * **Bug Fix**
  * Fix `runtime` built-in catchall not properly checking for local variables.

## 5.1.5

 * **Internal**
  * Bump `core-js` version.

## 5.1.4

 * **Polish**
  * Add missing `Reflect` methods to runtime transformer.

## 5.1.3

 * **Internal**
  * Switch entirely to vanilla regenerator.
  * Clean up and make the parsing of decorators stateless.
 * **Bug Fix**
  * Don't do TCO on generators and async functions.
  * Add missing `core-js` runtime definitions.

## 5.1.2

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