Esprima

* Support ES2016 exponentiation expression (issue 1490)
* Support JSX syntax (issue 1467)
* Use the latest Unicode 8.0 (issue 1475)
* Add the support for syntax node delegate (issue 1435)
* Fix ESTree compatibility on meta property (issue 1338)
* Fix ESTree compatibility on default parameter value (issue 1081)
* Fix ESTree compatibility on try handler (issue 1030)

* Fix tokenizer confusion with a comment (issue 1493, 1516)

* Fix out-of-bound error location in an invalid string literal (issue 1457)
* Fix shorthand object destructuring defaults in variable declarations (issue 1459)

* Do not allow trailing comma in a variable declaration (issue 1360)
* Fix assignment to `let` in non-strict mode (issue 1376)
* Fix missing delegate property in YieldExpression (issue 1407)

* Fix the handling of semicolon in a break statement (issue 1044)
* Run the test suite with major web browsers (issue 1259, 1317)
* Allow `let` as an identifier in non-strict mode (issue 1289)
* Attach orphaned comments as `innerComments` (issue 1328)
* Add the support for token delegator (issue 1332)

* Properly allow or prohibit `let` in a binding identifier/pattern (issue 1048, 1098)
* Add sourceType field for Program node (issue 1159)
* Ensure that strict mode reserved word binding throw an error (issue 1171)
* Run the test suite with Node.js and IE 11 on Windows (issue 1294)
* Allow binding pattern with no initializer in a for statement (issue 1301)