Version 6.5.1

### Bug fixes

Fix a crash in the Stylus mode's indentation logic.

Version 6.5.0

### New features

Simple modes can now include a `mergeTokens` option in their language data to disable token merging.

Version 6.4.3

### Bug fixes

Make Pascal keyword matching case-insensitive.

Fix a crash in simple-mode.js when using the `dontIndentStates` feature.

Fix a bug in tokenizing multiline strings in xQuery.

Version 6.4.2

### Bug fixes

Fix an issue in the Groovy mode where interpolated variable style would continue after whitespace.

Add support for underscore separators in numbers in the Dart mode.

Version 6.4.1

### Bug fixes

Stop treating closing brackets as brackets in the Common Lisp mode.

Fix a bug where the Stylus mode would crash when queried for indentation.

Version 6.4.0

### Bug fixes

Only match Solr operator words when they are upper-case.

Fix an infinite loop when tokenizing heredoc strings in the Crystal mode.

### New features

Add the old Pug mode.

Version 6.3.3

### Bug fixes

In Shell mode, don't allow spaces in heredoc tokens.

Version 6.3.2

### Bug fixes

Fix tokenizing of character literals in the Scala mode.

Version 6.3.1

### Bug fixes

In JavaScript, properly parse keywords like `static` when in front of a private property.

Version 6.3.0

### New features

Add the old PegJS mode.