Bump major semver version
Bump major semver version

FB-Specific changes:
* Type annotations changed to TypeScript style
  (partial typescript support -- not all of it)

Upstream changes:
* Module export specifier changes from upstream
  (default export should not be treated specially)

facebook/esprima,kittens/esprima,fishbar/esprima,facebook/esprima,thr0w/esprima,facebook/esprima,kittens/esprima,fishbar/esprima,fishbar/esprima,sebmck/esprima,facebookarchive/esprima,facebookarchive/esprima,facebookarchive/esprima,jeffmo/esprima,thr0w/esprima,sebmck/esprima,thr0w/esprima