Version 2.9.0

New functionality and features

• Add support for OCR in transformation (#224)
• Add support for POW operator

Bug Fixes

• Fix fontAntialiasing type definition (#233)
• Fix Transformation normalization for predefined variables
• Fix Transformation normalization in browsers that do not support
  lookbehind in regular expressions (#228)
• Fix bug where preview:duration was shortened to preview:du

Other Changes

• Update test descriptions (#223)
• Update devDependencies packages
• Remove CoffeeScript and Grunt mentions from readme (#222)
• Remove unneeded TODO.md file (#221)
• Update issue templates (#218)