# 1.12.20

 * Append `sourceMappingURL` when using `bin/6to5` and output sourcemaps.

# 1.12.19

 * Add `comments` option and `--remove-comments` flag. Thanks @[webpro](htps://github.com/webpro)!
 * Embed `regenerator`.

# 1.12.18

 * Use `global` reference instead of `window`.

# 1.12.17

 * Add `moduleName`, `sourceRoot` and `filenameRelative` options - thanks @[darvelo](https://github.com/darvelo)!
 * Traversal optimisations.

# 1.12.16

 * Fix comments not being retained from `MethodDefinition` in classes.
 * Add temporal dead zone in default parameters.

# 1.12.15

 * Update `acorn-6to5`.

# 1.12.14

 * Fix duplicate let scoping in functions.
 * Make JSX whitespace more React-compliant.
 * Add `_memberExpressionKeywords` transformer that turns keyword identifiers to computed literals.
 * Upgrade `regenerator-6to5`.

# 1.12.13

 * Support duplicate constants within different block scopes.
 * Fix for-head duplication testing and replacement.
 * Support `raw` property on tagged template literals.

# 1.12.12

 * Make scope tracker more reliable to handle all edgecases.

# 1.12.11

 * Block scope classes.
 * Fix generation of integer `Literal`s in `MemberExpression`.

# 1.12.10

 * Fix let scoping var hoisting.

# 1.12.9

 * Escape unicode characters when generating string `Literal`s.
 * Fix semicolons being output for statements in `ExportDeclaration`.
 * Fix `WithStatement` missing parenthesis.

# 1.12.8

 * Temporarily forbid `AssignmentExpression` destructuring outside of `ExpressionStatement`.

# 1.12.7

 * Update to latest `acorn-6to5`.

# 1.12.6

 * Update to latest `acorn-6to5`.

# 1.12.5

 * Fix excessive whitespace trimming resulting in innaccurate sourcemap line.

# 1.12.4

 * Add `doc` folder for documentation.

# 1.12.3

 * Support generator comprehensions.
 * Use `Array.from` instead of `Array.prototype.slice` in spread transformer.
 * Support spread in `NewExpression`s.

# 1.12.2

 * Upgrade `matcha` to `0.6.0` and `browserify` to `6.3.2`.
 * Add own `trimRight` helper instead of relying on the string instance method.
 * Support JSX spreads that aren't the first.

# 1.12.1

 * Fix `this` and `arguments` mapping in the `_aliasFunctions` transformer.

# 1.12.0

 * Combine `jsx` and `react` transformers to `react`.
 * Update `react` syntax output to React v0.12.

# 1.11.15

 * Fix JSX literal whitespace generation.

# 1.11.14

 * Avoid using a switch for let-scoping continue and break statements and use an if statement instead.
 * Remove excess whitespace and newlines from JSX literals.

# 1.11.13

 * Update regenerator-6to5
 * Add support for most escodegen formatting options