Add syntax support for ES6 generators
Merge pull request #221 from buztard/generator-syntax

Add syntax support for ES6 generators
add js assignment expression and relate identifier match syntax
number: match literals such as 1e-3
modified jsDocParam to highlight jsdoc optional parameter and default value
Merge pull request #225 from ryanoasis/jsdoc-optional-param-highlight

highlight jsdoc optional param and optional param with default value (corrected)
Merge pull request #220 from crusoexia/develop

Match function declaration identifier and related object chain
Merge pull request #223 from davidchambers/exponential-notation

number: match literals such as 1e-3